I'll see about getting my mods into a GitHub repo (I need to do that anyway) for you to pull from.
I've got no idea about the message you put up but I'll poke around. Maybe it's something crazy MultiMC is doing but it's odd since:
[10:53:04] [main/INFO] [FML/]: Java is Java HotSpot 64-Bit Server VM, version 1.7.0_51, running on Mac OS X:x86_64:10.9.4, installed at /Library/Java/JavaVirtualMachines/jdk1.7.0_51.jdk/Contents/Home/jre