@hasherr well I got OptiFine working, but it seems to have dropped my fps by 10 instead of improving it. you can try it if you want though, see if it helps. download the 1.4.6 version here (
optifine.net/downloads.php) then put the zip file into your [ftb]/MindCrack/instMods folder. don't unzip it or anything, just put the whole file there.