I am working on a Minecraft launcher to auto-install all my server's mods automatically. Everything installs and runs, but it loaded from .minecraft instead of my folder... So I made a mod that overrides Minecraft.java(Only way I know how to do it) to change the directory for the folder. It changed the directory fine. But, after forge is done setting up, I get an odd error...

 

 

Here's the log...

 

 

Setting game location to debuglocation!
2013-07-08 21:30:03 [iNFO] [ForgeModLoader] Forge Mod Loader version 5.2.2.684 for Minecraft 1.5.2 loading
2013-07-08 21:30:03 [iNFO] [ForgeModLoader] Java is Java HotSpot(TM) 64-Bit Server VM, version 1.7.0_02, running on Windows Vista:amd64:6.0, installed at C:\Program Files\Java\jre7
2013-07-08 21:30:10 [iNFO] [ForgeModLoader] Found valid fingerprint for Minecraft Forge. Certificate fingerprint de4cf8a3f3bc15635810044c39240bf96804ea7d
2013-07-08 21:30:29 [iNFO] [sTDOUT] 229 recipes
2013-07-08 21:30:30 [iNFO] [sTDOUT] 27 achievements
2013-07-08 21:30:30 [iNFO] [Minecraft-Client] Setting user: stumblinbear
2013-07-08 21:30:30 [iNFO] [sTDOUT] (Session ID is 2535cc853bfaba68b194394f4028f3e100f06181)
2013-07-08 21:30:30 [iNFO] [sTDERR] Client asked for parameter: server
2013-07-08 21:30:30 [iNFO] [Minecraft-Client] LWJGL Version: 2.4.2
2013-07-08 21:30:31 [iNFO] [sTDERR] Exception in thread "Minecraft main thread" java.lang.NoSuchMethodError: net.minecraftforge.client.ForgeHooksClient.createDisplay()V
2013-07-08 21:30:31 [iNFO] [sTDERR]    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:380)
2013-07-08 21:30:31 [iNFO] [sTDERR]    at net.minecraft.client.MinecraftAppletImpl.func_71384_a(SourceFile:56)
2013-07-08 21:30:31 [iNFO] [sTDERR]    at net.minecraft.client.Minecraft.run(Minecraft.java:734)
2013-07-08 21:30:31 [iNFO] [sTDERR]    at java.lang.Thread.run(Unknown Source)

 

 

 

 

I do NOT want to use MultiMC... I already looked through their source to see how they did it and came up with nothing... Can anyone help?

I advise dropping any plans of custom launchers with the new official launcher.

Find a way to install your modpack as a profile in the new launcher.

I've already configured it to work with the new launcher :3

Good then, also this never had anything to do with Forge itself, so have fun!