MSVDM - thats Microsoft Virtual Desktop Manager is one kick ass Power Toy to install in XP. it is so KDE-ish. this is something i would like to see done in OS X. this is great, i have Dreamweaver in slot 1, Photoshop in slot 2 and now i dont have to minimize one to get to the other, its just a keystroke away.
i would suggest you turn off "Use Animations" this animates the 4 dekstops when you click the Preview button to see the 4 in a slit screen view. even on a ATI 9700 Pro this animation is kinda jumpy. if you turn it off the preview of all 4 show up with no slow delay because of the stupid animation.
turning off "Shared Desktops" also makes more sense than leaving that option on. with Shared Desktops off every desktop has its own seperate task bar buttons. if you leave it on and click on Photoshop for example, you will bring photoshop up on the current desktop, and it will no longer be maximized on the other virtual desktop.
with "Shared Desktops" turned off when you alt+tab through active programs, it will only show the apps in the virtual desktop you are in, not all 4 virtual desktops.
the default keyboard shortcuts to switch desktop, win+1,2,3,4 is great. i can tell i am really gonna use this MSVDM a lot now that i have it installed.
the only covet i have come accross so far is WebShots doesnt work with 4 desktop pictures, and the main Trillian also seems to show up on all 4 dekstops. oh well. i'll live.