Hi,
The Gulliver mod for minecraft version 1.4.6 won't work with forge.
All modloader mods should work with forge, but this mod won't.
Here is my forgemodloader-client-0.log:
2012-12-28 13:46:20 [iNFO] [ForgeModLoader] Forge Mod Loader version 4.6.15.514 for Minecraft 1.4.6 loading
2012-12-28 13:46:20 [FINEST] [ForgeModLoader] All core mods are successfully located
2012-12-28 13:46:20 [FINEST] [ForgeModLoader] Discovering coremods
2012-12-28 13:46:20 [FINEST] [ForgeModLoader] Found library file argo-2.25.jar present and correct in lib dir
2012-12-28 13:46:20 [FINEST] [ForgeModLoader] Found library file guava-12.0.1.jar present and correct in lib dir
2012-12-28 13:46:20 [FINEST] [ForgeModLoader] Found library file asm-all-4.0.jar present and correct in lib dir
2012-12-28 13:46:20 [FINEST] [ForgeModLoader] Found library file bcprov-jdk15on-147.jar present and correct in lib dir
2012-12-28 13:46:20 [FINEST] [ForgeModLoader] Running coremod plugins
2012-12-28 13:46:20 [FINEST] [ForgeModLoader] Running coremod plugin FMLCorePlugin
2012-12-28 13:46:20 [iNFO] [ForgeModLoader] Found valid fingerprint for Minecraft Forge. Certificate fingerprint de4cf8a3f3bc15635810044c39240bf96804ea7d
2012-12-28 13:46:20 [FINEST] [ForgeModLoader] Coremod plugin FMLCorePlugin run successfully
2012-12-28 13:46:20 [FINEST] [ForgeModLoader] Running coremod plugin FMLForgePlugin
2012-12-28 13:46:20 [FINEST] [ForgeModLoader] Coremod plugin FMLForgePlugin run successfully
2012-12-28 13:46:20 [FINEST] [ForgeModLoader] Validating minecraft
2012-12-28 13:46:20 [FINEST] [ForgeModLoader] Minecraft validated, launching...
2012-12-28 13:46:22 [iNFO] [sTDOUT] 27 achievements
2012-12-28 13:46:22 [iNFO] [sTDOUT] 210 recipes
2012-12-28 13:46:22 [iNFO] [sTDOUT] Setting user: Dan_Dano, 4214535129427216733
2012-12-28 13:46:22 [iNFO] [sTDOUT] LWJGL Version: 2.4.2
2012-12-28 13:46:23 [iNFO] [ForgeModLoader] Attempting early MinecraftForge initialization
2012-12-28 13:46:23 [iNFO] [sTDOUT] MinecraftForge v6.5.0.486 Initialized
2012-12-28 13:46:23 [iNFO] [ForgeModLoader] MinecraftForge v6.5.0.486 Initialized
2012-12-28 13:46:23 [iNFO] [sTDOUT] Replaced 84 ore recipies
2012-12-28 13:46:23 [iNFO] [ForgeModLoader] Completed early MinecraftForge initialization
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Building injected Mod Containers [cpw.mods.fml.common.FMLDummyContainer, net.minecraftforge.common.ForgeDummyContainer]
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Attempting to load mods contained in the minecraft jar file and associated classes
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Skipping known library file C:\Users\Thomas\AppData\Roaming\.minecraft\bin\lwjgl.jar
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Skipping known library file C:\Users\Thomas\AppData\Roaming\.minecraft\bin\jinput.jar
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Skipping known library file C:\Users\Thomas\AppData\Roaming\.minecraft\bin\lwjgl_util.jar
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Found a minecraft related file at C:\Users\Thomas\AppData\Roaming\.minecraft\bin\minecraft.jar, examining for mod candidates
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Skipping known library file C:\Users\Thomas\AppData\Roaming\.minecraft\lib\argo-2.25.jar
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Skipping known library file C:\Users\Thomas\AppData\Roaming\.minecraft\lib\guava-12.0.1.jar
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Skipping known library file C:\Users\Thomas\AppData\Roaming\.minecraft\lib\asm-all-4.0.jar
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Skipping known library file C:\Users\Thomas\AppData\Roaming\.minecraft\lib\bcprov-jdk15on-147.jar
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Minecraft jar mods loaded successfully
2012-12-28 13:46:23 [iNFO] [ForgeModLoader] Searching C:\Users\Thomas\AppData\Roaming\.minecraft\mods for mods
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Found a candidate zip or jar file gulliver-0.10.1-MC1.4.5.zip
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Examining file minecraft.jar for potential mods
2012-12-28 13:46:23 [FINE] [ForgeModLoader] The mod container minecraft.jar appears to be missing an mcmod.info file
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Examining file gulliver-0.10.1-MC1.4.5.zip for potential mods
2012-12-28 13:46:23 [FINE] [ForgeModLoader] The mod container gulliver-0.10.1-MC1.4.5.zip appears to be missing an mcmod.info file
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Identified a BaseMod type mod mod_Gulliver
2012-12-28 13:46:23 [iNFO] [ForgeModLoader] Forge Mod Loader has identified 4 mods to load
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Received a system property request ''
2012-12-28 13:46:23 [FINE] [ForgeModLoader] System property request managing the state of 0 mods
2012-12-28 13:46:23 [FINE] [ForgeModLoader] After merging, found state information for 0 mods
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Activating mod mcp
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Activating mod FML
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Activating mod Forge
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Enabling mod mod_Gulliver
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Activating mod mod_Gulliver
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Verifying mod requirements are satisfied
2012-12-28 13:46:23 [FINE] [ForgeModLoader] All mod requirements are satisfied
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Sorting mods into an ordered list
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Mod sorting completed successfully
2012-12-28 13:46:23 [FINE] [ForgeModLoader] Mod sorting data:
2012-12-28 13:46:23 [FINE] [ForgeModLoader] mod_Gulliver(mod_Gulliver:Not available): gulliver-0.10.1-MC1.4.5.zip ()
2012-12-28 13:46:23 [FINER] [ForgeModLoader] Sending event FMLConstructionEvent to mod mcp
2012-12-28 13:46:23 [FINER] [ForgeModLoader] Sent event FMLConstructionEvent to mod mcp
2012-12-28 13:46:23 [FINER] [ForgeModLoader] Sending event FMLConstructionEvent to mod FML
2012-12-28 13:46:23 [FINER] [ForgeModLoader] Sent event FMLConstructionEvent to mod FML
2012-12-28 13:46:23 [FINER] [ForgeModLoader] Sending event FMLConstructionEvent to mod Forge
2012-12-28 13:46:23 [FINER] [ForgeModLoader] Sent event FMLConstructionEvent to mod Forge
2012-12-28 13:46:23 [FINER] [ForgeModLoader] Sending event FMLConstructionEvent to mod mod_Gulliver
2012-12-28 13:46:23 [iNFO] [sTDERR] Exception in thread "Minecraft main thread" java.lang.NoSuchFieldError: bt
2012-12-28 13:46:23 [iNFO] [sTDERR] at mod_Gulliver.<clinit>(mod_Gulliver.java:20)
2012-12-28 13:46:23 [iNFO] [sTDERR] at java.lang.Class.forName0(Native Method)
2012-12-28 13:46:23 [iNFO] [sTDERR] at java.lang.Class.forName(Unknown Source)
2012-12-28 13:46:23 [iNFO] [sTDERR] at cpw.mods.fml.common.ModClassLoader.loadBaseModClass(ModClassLoader.java:87)
2012-12-28 13:46:23 [iNFO] [sTDERR] at cpw.mods.fml.common.modloader.ModLoaderModContainer.constructMod(ModLoaderModContainer.java:489)
2012-12-28 13:46:23 [iNFO] [sTDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2012-12-28 13:46:23 [iNFO] [sTDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
2012-12-28 13:46:23 [iNFO] [sTDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
2012-12-28 13:46:23 [iNFO] [sTDERR] at java.lang.reflect.Method.invoke(Unknown Source)
2012-12-28 13:46:23 [iNFO] [sTDERR] at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)
2012-12-28 13:46:23 [iNFO] [sTDERR] at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
2012-12-28 13:46:23 [iNFO] [sTDERR] at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
2012-12-28 13:46:23 [iNFO] [sTDERR] at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
2012-12-28 13:46:23 [iNFO] [sTDERR] at com.google.common.eventbus.EventBus.post(EventBus.java:268)
2012-12-28 13:46:23 [iNFO] [sTDERR] at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:140)
2012-12-28 13:46:23 [iNFO] [sTDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2012-12-28 13:46:23 [iNFO] [sTDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
2012-12-28 13:46:23 [iNFO] [sTDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
2012-12-28 13:46:23 [iNFO] [sTDERR] at java.lang.reflect.Method.invoke(Unknown Source)
2012-12-28 13:46:23 [iNFO] [sTDERR] at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)
2012-12-28 13:46:23 [iNFO] [sTDERR] at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
2012-12-28 13:46:23 [iNFO] [sTDERR] at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
2012-12-28 13:46:23 [iNFO] [sTDERR] at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
2012-12-28 13:46:23 [iNFO] [sTDERR] at com.google.common.eventbus.EventBus.post(EventBus.java:268)
2012-12-28 13:46:23 [iNFO] [sTDERR] at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:83)
2012-12-28 13:46:23 [iNFO] [sTDERR] at cpw.mods.fml.common.Loader.loadMods(Loader.java:478)
2012-12-28 13:46:23 [iNFO] [sTDERR] at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:161)
2012-12-28 13:46:23 [iNFO] [sTDERR] at net.minecraft.client.Minecraft.a(Minecraft.java:410)
2012-12-28 13:46:23 [iNFO] [sTDERR] at asq.a(SourceFile:56)
2012-12-28 13:46:23 [iNFO] [sTDERR] at net.minecraft.client.Minecraft.run(Minecraft.java:744)
2012-12-28 13:46:23 [iNFO] [sTDERR] at java.lang.Thread.run(Unknown Source)