Windows 7 boot by itself

[J_L]

Ever since I've tried it out since dual-booting it with XP, I've grown more and more used to it, and now it's my primary OS.
Now I want to get rid of XP, because it's completely useless and a waste of space.

The problem with that is because all the important system boot files are within my XP partition, so copying the partition over doesn't work, makes computer unbootable. Same with labeling the Windows 7 partition Active (it's the Boot and Pagefile, while the Windows XP partition is System and Active).

So, how do I make Windows 7 completely bootable by itself?

Edit:
Reinstallation is not an option.

[PsychEroc]

I've had similar boot probs in the past, but all were solved by booting from the Win7 installation DVD and choosing to repair boot problems.
I also seem to remember one time I had to manually set my Win7 partition as active and my Vista partition as inactive. This had to be done outside of windows, via some bootable disk (I used the commercial boot tools from Paragon, but I think there are some partition management tools available on the Win7 repair disk).

[J_L]

Thanks for the suggestion, I will try it sometime this weekend.

[Jojoyee]

I used to rely on EasyBCD to manage which system to boot. Would that be any helpful?

[J_L]

Thanks, PsychEroc, it worked! Took a long while to restore from the damned disk image, I knew I should've just copied, but I wanted to make sure my backups were alright (verify doesn't seem to exist in my Paragon Disc Backup Boot Disc, main program incompatible with 7). Also should have deleted the duplicate partition before booting, but now everything's fine.

Thanks again!

@Jojoyee: Sorry if it seemed that I ignored you, but one suggestion at a time, that's just how I work.