server 2003 license key

ok, maybe some one has some options for me. Recently I had to run a repair installation on a 2003 windows server. System would not boot in any fashion... Apparently the other technician did not copy the key correctly and now after I ran the install I cannot activate the software when prompted because the key he recorded is invalid. Luckily the clients can access the networked drives, but it is impossible to login to the actual server without the key. Can anyone please give me some real options? this is a major problem.

Thanks in advance.