Two things to mention.
One technically you are not allowed to use the restore disk on another PC it is meant to die with the machine. You are in breach of the licencing agreement with Microsoft if you do use it and it might fail validation.
Two even if it does work and even if Microsoft do revalidate it, which to be honest I don't think they will do, you might find that the restore disk only contains certain drivers etc and might not install properly on the new PC. It might be ok I don't know as I've never tried it. If you did get it up and running then you could download the drivers needed from the website - hopefully.