A bit of old school here, but in the past using Altiris (sorry don't know the version), from the management console, a command to rename the computer could be issued and Altiris would change the computer name, add it to the domain, reboot the system, etc. This feature was very handy for remote offices and when naming standards changed. My organization has moved to SCCM, and I'm surprised SCCM 2012 cannot perform the same feature, or can it?