DELL and OEM Distro disks will not work. They only work with a set string of keys. You need a corporate licensing copy. Sort of like XP. Home and Pro only work with a set predetermined string of keys. But Pro Corporate works with any key.
You should be able to find a release on piratebay, sumo, mininova, etc that will work with your key.
Uncle RoD will teach you all the piracy stuff, stand close kiddies.