Logical enough, but you forgot to consider that Microsoft actually released Win7 as a beta to Win8. They decided to release a simplified version of Win8 and started selling it so they can collect their bug and error data and patch everything they can before they release this "mind-blowing" user interface. But I'm not 100% sure, you could be right, but I'm pretty sure that's the case. I also have a feeling that Vista was a beta to Win7 though, it was absolutely terrible..
If I were to make my own OS though, it would probably be based on XP, but probably with a linux kernel if that's possible.
EDIT: Finally able to download a few of those files and look at them, looks like this'll be a breeze:3 The computer teacher at school wants me to put Win7 on a few old computers at the school so we can use them temporarily, but he didn't know how he would get the license keys so I told him I'll handle that, so I'll be using this pretty hard for a little bit after I reinstall that laptop:D
EDIT 2: I'm having an issue with Win7 Loader eXtreme Edition, everytime I extract the RAR and go into the folder, an application file called "w7lxe" disappears right in front of my eyes O.o, and its the only application file in there so I'm sure I need it