More on the Poser 5 "stops responding" at FFVrml.arp on startup after applying SR4 on ME. (I haven't heard back from Tech Support yet) I've backed up my large runtime dir (15+ gbs) so my "assets" are saved. (huge sigh of relief) next steps/test: 1) I'll install Poser 5 into a brand new and clean directory (barebones runtime) then reboot my system. (after deactivating antivirus software) 2) start Poser to allow it to initialize itself. 3) If ok, I'll re-install SR4 and restart my system again. 4) Restart Poser and if ok, copy back my Runtime dir into it. 5) Run Poser again to see if the runtime dir size still an issue. I'm thinking the first start of Poser either via install or SR, the relative size of the runtime dir may be a factor. Once this initial start runs, then the system runs ok after that. Secondly the usage of Cacheman had been recommended by Curious Labs as a way to deal with memory usage by ME systems. The OS limits an application to 128mbs ram only (even though I have 512mbs I can't use it). My second thought, does Poser SR4 require mote then 128mbs to startup? I'll keep you updated on progress. If all else fails, I'll move my Poser to my XP box. Russ