Seriously-those "repair" companies can't do anything you can't do yourself. They just pray on those looking for quick fixes and there's no such thing when it comes to fixing your credit.
You can get a lot of information here and ask for advice for any problems you have. I used it in the past to get advice getting rid of old stuff. You just have to be persistent with the credit reporting agencies to get stuff deleted.
http://debt-consolidation-credit-rep...ce.com/forums/