Ok so i've just spent the past few hours tweaking the inner workings of my computer. I've increased the Java heap size to 2048, and also the java memory in the contol panel to 2048. While I already am a master at uploading and utilizing texture packs, I can't seem to get this right. I already have the Mcpatcher HD texture fix and pached the game, but i can only run 32x32 packs. I've specificly been trying the LB Photo Realistic Pack on 64 and 128. Both work in the test minecraft in mcpatcher after some lag but crash the actual minecraft game. HELP!!!
P.S. I run a Windows 7 64 bit if that helps.