Installing XP with out manufacturers original XP restore disk, possible with OEM disk?

A client of mind has lost his XP home restore disk for his HP brand desktop. I need to reinstall windows for the client. I would like to know if a generic OEM install disk would work; by work I mean that when I put his CD key in windows will take it. I know I can order the cds but I need to get this done asap. I have read mixed things online and would like a definite answer if anyone has one.

It's possible, but iffy. I found (having had an HP desktop a few years ago) that HP's OEM keys are sometimes set up to only work with their restore discs. They may have changed how they work, but that was my experience. In fact, with mine I was even unable to use my CD key with a different HP model's restore discs. If it works, great, but I'm thinking it's very possible it wont. It certainly won't work with a standard XP disc.

It would probably work, as long as it's an XP Home OEM disk. The best way to find out is to simply try!

I would suggest doing a bare-metal backup of the disk with something like Acronis True Image or DriveImage XML.