Two XP installs on one partition...I've done that before
That means that you have 2 Windows folders...Windows and Windows.0, with the Windows.0 folder being the version that actually boots.
There's a problem with your programs...you cannot simply move installed programs from one install to another
. They simply won't work, due to settings and connections which were on Install 1...not being transfered to Install 2. These settings will exist only for the 1st Install and can be changed only from within the 1st Install.
There's no problem with data files, other than the ones which may be in My Computer, My Docs & Settings. To access those files, you might have to take ownership...you may not. In case you do, How to take ownership of a file or folder in Windows XP - http://support.microsoft.com/kb/308421
You can/should move your Favorites, email files, cookies from the bad install to the good.
Once you have moved whatever from the Old XP install to the New XP install...you simply delete the old Windows folder and your excess install is kaput.
You will have make a minor adjustment to get the boot.ini file to reflect the correct number of boot options for you (1 install, rather than 2), but this is an easy, effective way of doing that (after you have finished all else): Removing the invalid entries from Boot.ini - http://windowsxp.mvps.org/bootopt.htm
<<...I had to use a friend's CD that he had downloaded from somewhere, but it is fine. It didn't even ask me to put in my CD Key.>>
Well...you did not HAVE to, you chose to do that. Small potatoes to me, but that is an illegal XP install CD. I would not be surprised if your system continues to have problems or develops new problems, as a result of such. In the event that you do...you need to be mindful of the fact that official forum policy frowns on illegal downloads and such.
From the forum rules, http://www.bleepingcomputer.com/boardrules.php
:No subject matter will be allowed whose purpose is to defeat existing copyright or security measures. If a user persists and/or the activity is obviously illegal the staff reserves the right to remove such content and/or ban the user. This would also mean encouraging the use or continued use of pirated software is not permitted, and subject to the same consequences.
XP FAQ, Two XP Installs On Same Partition - http://www.michaelstevenstech.com/xpfaq.html#20