Most games should have the option of that, but the only thing is that its going to kick ur computers ass. its hard to run things ina vidoe, unless you have a really kick ass video card. which yours is ok.. so maybe you can. but the only thing i can run in a window is guild wars.. lol css wont even run in a window for me. and as for hittin alt+tab, i just use the windows key, but its no big deal, if u have the resolution set the same as windows. then its no big deal to change it..