I have the same card, the 512mb x1800XT, and currently all the games I want to play this card does fine on. I can't justify a newer faster more efficient card until there is a game I want to play it can't max out cause it still does a great job. Maybe SCII will be that game.
Right click My Docs and see if you can't figure out how to do that on Windows. That only does docs, if you want the profile you'll have to right click my computer and change some settings in Computer Management.
On a network there is something called group policy and active directory that lets you set this for the entire domain. A nightmare!!!
Seriously, at least bash Windows with stuff it can't easily do.