is it worth it to pay the 10 bucks to get this "express upgrade" to vista? secondly, what the FUCK is an express upgrade? ive seen it everywhere, but no one explains it. im pretty sure its just like back in the day when we had windows 98 and i got a shitty fucking 'upgrade' disc to windows 98SE. basically, i want to know if i can format my comptuer(dell laptop) with this disc. i dont want to have to reinstall WMC then install the upgrade. can someone clarify?