Windows XP Professional SP3

I was messing around in the registry which I probably have no business doing.

I went to modify a value for:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows\AppInit_DLLs

To test my program. Instead, I accidentally deleted the AppInit_DLLs key. I re-created it though and made sure I didn't make a typo or something.

Anyway, I restart my computer, and after it is done loading the XP screen with the progress bar, the computer restarts on its own. Last Good Configuration didn't work, safe mode didn't work.

So, I re-installed XP on the same partition (not a good idea, I know) so I can still access my old files. And the registry key being deleted is the only thing I can think of that could have caused it.

Is there some way I can fix the registry on the other installation of XP since I have access to all files on it?