i think that your best bet would be to ask a computer forum... b/c i doubt anyone here knows how to do what your trying to do... anyways, best of luck to ya...
oh and about breaking blizzard's end user aggrement.. sure, it may give us an unfair advantage teleing farther.. but i dont think that is too big of a deal.. i mean they should have upgraded the resolution a long time ago. lol
also, what about those poor souls still stuck using 640*480?