You might look at the burnmemory switch in XP msdn.microsoft.com/en-us/library/ms791475.aspx maxmem might work as well but burnmemory seems to be preferred support.microsoft.com/kb/108393. In either case, if it works, the downside is that you'd have to reboot each time to use it.

A better alternative might be to get Microsoft's free VirtualPC or VMWare and run Poser in a virtual machine where you can set the memory to whatever you want. I run Visual Studio on a Windows 2000 VM over XP using Virtual PC and it works great.On a fast machine the emulation speed should be OK for Poser 4. A possible problem would be that it will only emulate a basic video card. You can get at least 1024x768/32 bit though and I'm guessing that with Poser's requirements, it would probably work OK. Using a VM, you can set up whatever Poser "machine" you want. Give it 2GB and use the rest to run your main OS on the physical machine.

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken