Win4Lin is a complete rebuild of the old SCO Merge proggie (so I suppose it would be analogous) - it patches a chunk of the Linux kernel so that you get a program that pretends it's Win98 (or WinME) , and uses the real Windows DLL files. I think there's a compatibility list somewhere, but I know for fact that I can get Poser 4/PPP and Vue 4 going on it, as well as Dark Whisper's V3/V2 texture convertor thingy. Haven't tried Rhino yet (I have AC3D and Equinox running native on Linux, but I'm scrimping for Maya 4.5's $450 academic price, which will also run just fine on Linux :) ) Another great setup is Codeweavers' Plugins, which runs all of MS Office, Quicken, Adobe Photoshop (up to 7.0), but I don't know if it does Poser or Vue. It can be had for $60 at codeweavers.org (I think that's the addy) wine, ( the OSS version - www.winehq.org ) can run things like Half-Life and such, but they've shifted towards providing a core for other emulation projects to run with, in return for financial support and reciprocal R&D efforts in accordance with the GNU GPL. /P