[H] XP Repair install problem

[Thane Sherrington (S)]

When XP is getting ready to offer to do a repair install, it says 
"Searching for Windows installs."  What is it looking for?  I have a 
machine with what appears to be a complete Windows folder, but it won't 
boot, and booting from the CD only offers deleting the partition or 
installing Windows into the partition that's there.  No repair option.  Any 
ideas?

T