I run Bryce 5 on XP Pro and I have the Bryce patch applied. There have been no problems on my system running these two together, but before I applied the patch Bryce did seem to be prone to annoying little glitches, like crashing. Now it works fine. Hope this helps. Catlin Actually the only problem I can think of with XP is that by itself it needs about 128mb ram, so you really need at least 512mb ram to cope with Bryce as well.