You might be able to run Poser5 on what you've got but it'll be painfully slow. your video card is fine as it is but the rest should be upgraded asap. Get yourself a pentium3/4 1Ghz would be good, Ram would be better at the 1Gb mark too as Poser5 uses it all & more. Using WinXP or Win2k is a good idea too they have better memory management than Win98 or WinME which seems to be a big factor in whether Poser5 works or not. Make sure you get the SR3 updates for Poser5 too that's vital if you want any kind of good experience from using it :)

I heard the owner did to the merchants there what rosity has been doing here, cuttin the amount of money paid to merchants. They started with 10% then finished with taking all the money so merchants quit selling there. But that's just a rumour of course, & I'm sure rosity would never do that to the merchants here.