32-bit programs - and Bryce is among them - can only address 2 GB of memory, no matter how much there are installed. However, with 32-bit 4 GB can potentially be addressed. There is a flag that can be set at compile time to make the program aware of the whole address space (4 GB). With the LAA tool, this flag can be set and reset for any program. I have used LAA for quite a while and set all my Bryce versions installed (from 4 to 7.1) to large address aware. With Bryce 7.1, I get to around 3.5 GB until the memory runs out for Bryce.