Hello, everyone. I've just received two different windows 7 upgrade discs from HP and Dell. I've investigated both and found something interesting. First of all, these are both 64bit version. Secondly, it seems HP offers the free upgrade via Retail discs and Dell uses OEM discs. I'm wondering if it's possible to convert this into ultimate version using the leaked Dell SLP key floating around. If possible, how do I do that?Also, I've noticed there's no $OEM$ folder inside the sources folder, which is quite different from the so-called Dell OEM WINDOWS 7 DVD floating around. My guess is the ones we saw are probably home-made and the real one uses something different to insert the key and pre-activate the system. Feel free to share your thoughts. Any suggestion would be greatly appreciated.