I'm in this strange situation:

I have 3 partitions, one for Vista (C), one for Windows 7 (D), and one 10GB partition (E). At least that's how my original OEM Vista partition sees them.

The primary OS that I boot into everyday is Windows 7. The situation is that for some reason it sees the Windows 7 partition (its own) as drive C, the 10GB one as (D) and the Vista one as (E).

I've successfully used the Wubi installation before on Vista, but now it simply doesn't work.

Ubuntu just does not show up in the boot menu, no matter what I try to do. I'm running out of ideas. I heard it doesn't really play well with Windows 7 either. I set it to Vista compatibility mode and that didn't work, I also tried installing it from Vista itself and that didn't work either for some reason.

Any ideas what I should try?

If anyone is about to suggest EasyBCD, please underline the command-line instructions I'm gonna need to follow. Thanks.