Got one of these kits from Menards (home/lumber center) for $20. My kids bed room floor, right at the door, had a really bad squeek. The kit was very easy to understand and simple to use. I had to resist normal human nature (I read the instructions)well I skimmed the instructions and looked at the handy dandy pictures and the squeek is gone. I sort of wish I had other squeeks so I could use up the screws that came in the kit. I see the kit at mcfeeley's as well but they want $30 for it. Simply put, this thing worked.
Mike