googled in the past but my head spins, whether should be buying external drive, doing magic or simply getting windows 7 on a memory stick. happy to buy an external drive if itll actually work, but some site say it only works on machines that never had a drive. some explanations involve lots of hoops jumping and some dont.... i had bootcamp before,which id installed when drive was working, but i wanted to change the partition size and used an application Camptune, but it messed it up, apparently due to my windows disc not being too kosher (paragon told me this and still refunded me, which was nice of them) and so i wiped it and just have one partition. now i'd like to put it back to play fallout 3 again. what should i do?