Oops, forgot to check my mail for a while. When I click Poser 4 to start, the background window for P4 pops up really briefly, then immediately closes. I've got Poser 4 and poser 6 installed to different drives; I had poser 5 installed on yet another drive, but deleted it as soon as i saw that P6 was going to work, and that the interface looked a little bit better than p5, since I have alway HATED the poser 5 interface; i'm not ecstatic with P6's interface, but it is worlds better than P5, and I didn't see any reason to keep them both alive, I just deleted everything but the runtime. The Poser 4 install was not corrupt the day before i installed P6, which was the last time I used it; I like the interface on P4 for doing poses and animation layout. I can access my P4 runtime with no problem from within P6, but I really don't want to lose my P4; if nothing else I need it for compatability testing for merchant and freebie releases. It's probably got something to do with the way I had P4 set up; my OS crashed a couple of years ago, and i restored Poser from a backup. I'll just have to wait until my next trip to my out-of-state storage unit and hope the rats haven't eaten my metacreations box so I can do a re-install. But I was REALLY hoping this was a common glitch.