We have a group set up on the local machines that I am a part of that gives me local admin rights to the pc.

netdom renamecomputer rgmcistr18 /newname:rgmcsctest /userD:domain\user /passwordd:* /usero:administrator /passwordo:* /reboot:60

This is all I can get to even run, but it still doesn't work, and even if it did, it only would get me to change the name on the of one machine at a time.
I am using the netdom that is being downloaded off of Microsoft right now. I don't know how to find the exact version.