However, if you wish I can send you a copy of our latest pack. WARNING this is a HUGE mod pack, I'd recommend JVM arguments. I'll be happy to give them to you. Let me see if the link works. http://forum.feed-the-beast.com/threads/jvm-arguments-for-modded-minecraft-updated-12-30-13.28994/
Also set Permgen to 256MB or higher.
Also set Permgen to 256MB or higher.