answer:RAM limits are based on either OS addressing (which is why you need a 64-bit OS to exceed 4GB) or the BIOS, whichever is lower. In general, a hardware limit like your 256MB ceiling is not changable. It is remotely possible that the limit is due to the fact that 128MB was the largest DIMM they made back when that thing was built, but I doubt it. Comparing that Tecra’s specs to the minimum requirements for iTunes was… disheartening. The requirement for a DirectX 9.0 or greater video adapter with 32MB+ video RAM knocks you right out, even if we disregard the fact that WinXP SP2 is the oldest OS that iTunes supports. However, I know a man with a plan, and I expect him momentarily ;)