Hi!! What I would do is. Put your CD in your try, Reboot, Press F12 before windows loads. Change the boot from C drive, to boot from CD/DVD.
See if your PC will boot from your rescue CD. I take it right up to just before the restore, and then I exit.
Your boot sequence may be a little different, but it should be similar
If not, patio will correct me. patio is right CD's are cheap. You may never need this recovery disk but you never know when that old HD will die. I hope you have created a image of your drive on a external drive. If you need to know what files are on the disk, I can send you a screen shot. It would be better to just test it to see if your PC will boot from it.
I hope this helps and I'm not butting in.