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#11
You need this software to fix your partitions. There are other options, just I use this. I already told you, if you deleted the recovery partition your warranty is void!
First of all, very smart move on your decision to switch from Vista to XP. What u need is a bootable XP install disk, with a license code. And, u need to change your bios settings to load the CD-ROM drive first before the C Drive. Then it should work.
If all else fails, take it to your local pc shop and have them do it for u.
Also he doesn't need to take it to a shop, we have all the help he needs right here.
Boot Priority - Change - Vista Forums
I just realized you have Vista, here's this tutorial, though the principal is the same.
Dual Boot Installation with Windows Vista and XP - Vista Forums