I have 5 poser installations on my machine! c:/3d/Poser 3 (don't want to remove it cos it's cute!) c:/3d/Poser 4 (I can do nasty stuff to this install) c:/3d/Poser 5 (I can do nasty stuff here, too) d:/Poser 4 (my P4 how I like it) d:/Poser 5 (Hmmm... Poser 5 set up nicely) But I think I may be slightly bonkers. I like to have installations I can break, mess about and test my apps on (without losing anything!) I have never had any problems with these multiple installations! H:)