How should I recover this partition?

You might not have to change any settings at all. I believe the usual way to access the recovery partition is to:

1. If the computer is running, shut it down -- by clicking Start, Shut Down.
2. Press and hold the 0 (zero) key on your keyboard and then press the computer's power switch. When the computer turns on, the Toshiba HDD Recovery Utility screen should appear.

Once the Recovery Utility screen appears there should be three options: (1) Restore Original Factory Image (recommended); and for advanced users, (2) Restore Partition C: of HDD without changing current partition size; and, (3) Restore image to C: Partition with user specified size. Scroll down to the section called:

Using Toshiba HDD Recovery Utility from the recovery partition

How to use the Toshiba HDD Recovery Utility

Have you made a Win 7 install DVD or thumb drive yet? If not I wouldn't go fooling around with that partition.

I'll have to try that tomorrow, if I do it now I'll annoy everybody, probably.
Whenever I used to try that my computer would beep for about 10 seconds, and it was REALLY loud... Is there a way to tone it down, so it's a bit quieter? I will do the 0 key thing tomorrow, at least everyone's awake! :)

Has your Recovery Partition gone missing in Disk Mgmt?

Post back a screenshot of the maximized Disk Mgmt drive map and listings using the Snipping Tool in Start Menu, so we can see.

If it's actually missing then I'd use Partition Wizard Partition Recovery Wizard - Video Help. It will replace it right where it was, although you'll have to make space if you've already moved something there.

If it's not missing then cue it up to see if it will run from boot, then make your Recovery Disks so you have a backup and will know better if it runs.

If Recovery was there on a third partition then you must have done some work on your partitioning that deleted it and extended C into the space.

I'd boot free Partition Wizard Partition Recovery Wizard - Video Help to see if it finds anything, although if so it will want you to clear space from C to replace it. It's much harder to find a partition or data when its been partitioned over anyway.

May I ask what modification you've made of your Disk Manager? Is this a modified version of Win7?

I remember a while ago in diskmgmt there was about 10 gb's of unallocated space, so I merged it with my C: partition. I'm guessing that unallocated space may have been the recovery partition. I'm only 10% sure... My Windows 7 copy is genuine, it just looks different because I used a custom theme.

I think I should use my W7 disk I've already made. :) I just realized if I found that partition there'd be a lot of programs I wouldn't use... Thanks anyway guys!

For future reference here is how to get a perfect Clean Reinstall - Factory OEM Windows 7
based on countless thousands we've helped with here.