In case anyone stumbles upon this via google, I did the tons of reading for you and have a VERY easy solution.
1) DO NOT INPUT A SERIAL INTO WINDOWS 7, delete anything you got there and hit next, your now in windows 7
2) Goto my computer and run setup from the so called "upgrade disc" and then choose upgrade, install windows again, it will take longer then the first time, an hour or so.
3) When prompted for the serial, input it, as in the student serial is an "upgrade" serial and not full.
4) Enjoy windows 7
note - windows 7 has a grace period with no serial, by doing this your now upgrading from windows 7 to windows 7.