For anyone unable to run SR-1 at all - I was in that boat until I restored my system and applied the (then received) registration response (spit, snarl). Curiously enough, once registered I can apply SR-1(b) and Poser5 does load... ...still as slow as a slug carrying an elephant, but it loads. Mayhap I can learn a bit about how it's supposed to work... but I'm devastated that the program doesn't use hardware acceleration for previews - and a quick MIMIC test suggests that P4 was way faster at previews :(