I had previous had XP SP2 running on Beta 3. Saw that Beta 4 was out, so uninstalled, actually did a whole OS X re-install, then loaded Beta 4. Now everytime I try to load XPSP2 on the "standard VM", it fails with a warning about some driver/device not found. This is an XP issued alert, not Parallels. I have a screen shot of the error, but have not had a chance to change format for upload. I have tried every combination of reloading imaginable and I get this error everytime. It normally pops up after formatting the drive and rebooting during the XP install. It gets to the GUI where it gives you status, then presto... Again, this did not happen with Beta 3 and nothing else has changed for me. Thanks,