seeing as the ram disc is set at 128mb of ram, i would try booting with 64 mb of ram. If needs that much ram, you probably have a memory leak. My guess is that the computer will run out of memory while booting, and make a note of what it is loading. this should also disable the ram disk if i remember correctly. Also check your disk cache setting. There was a time that my system was using an absurd amount of ram, and it was because the disk cache was set to something like 128 mb. It is worth a shot. Let me know what you find.