You will never be able to install any beat iPhone software on a PC, because the beta software is meat for developers to make sure there apps work on 4.0, and to widen the base of people using it to find bugs faster. and seeing as only devs are supposed to have it, they odiously have a mac, because the sdk only works on mac. so why would they bother making it install on windows when they could use that time so make the firmware better? so in there eyes, everyone thats supposed to have it, can install it. people that arn't supposed to have it, can do what they want, but have to deal with the fact that apple wont consider you because your going behind there backs. (im not mad at you, im in the same category as you, i just own a mac teehee. just making sure your clear on when your getting yourself into when you install beta software when your not supposed to