yep, you can theres several programs you can install to hack the xp window manager, "windows blinds" is suposed to be good, some of the skins look pritty cool but iv heard its a bit heavy resorces. if you want to do somthing small like just install a theme, u can use "tune-up utilities 2006". it can install new themes, welcome screens and login screens. if you realy want to pimp your rig, install linux