Blue Fang set a cap of around 2 GB memory using a linker flag called /LARGEADDRESSAWARE. It was probably necessary at the time because computers weren't that great, but technically they could have allowed it to go up to 3 GB if they really wanted to. The game is 32 bit so that's as high as you can probably force it to go...if it were 64 bit it can be much higher. More memory during execution = more files. Maybe someday it can be unlocked. Would be cool.