Unfortunately no, the xbox games are written in a format that a pc can't read. You can either mod your xbox and 1. install a larger hdd and backup the games directly to it. or 2.mod your xbox and then access it by means of ftp to read the info on the original game disk, create an iso of the files, then use Nero or the like to burn the image to dvd media. Guides for this are posted throughout these forums, at xbox-scene.com and many other places.
ver 1.0, 1.5 and 1.6 with 200gb hdds & X3. Team Xecuter Pro front panel with LCD Screen (rocks). GC with qoob pro, Team xecuter's iced cube case mod and a BBA.
If you're downloading a game from say suprnova, it's best to just open it with Nero and burn straight to a dvd-r. BUT personally, if you're going to download games, the best place to go is torrentbits.org as i've never had problems with any sort of files from there, suprnova is ok but i've had a few bad files off there.