How Do I repair a corrupt MBR manually using another pc

Hello all, I have a 40 gig seagate hard drive which has a corrupt mbr and no partiotion table according to
partition magic. The drive consists of c:\ and d:\. The operating system, Windows XP, resides on c:\ and d:\ is used for backing up files which I want to keep, mp3, pictures. I can not boot from this drive, POST stops at "detecting IDE drives." I can however plug the drive into another pc, run a "scan hardware for changes" in my computer and windows 2000 will
see both partitions as new drives but no options are available for my damaged c:\ drive. My d:\ drive seems to work okay, I can backup theses files, see all properties. I want to restore this drive if possible because I need the files. Not sure where the best place to start is, whether it be a dos command or third party software or if I need to test for mechanical failure. Any help would be appreciated.
Thanks,
Matt