turkeyshoot

WSNAME workstation renamer http://mystuff.clarke.co.nz/wsname.asp I've used this utility in the past for a sysprep cd I made. It was pretty basic but after imaging would use an ipconfig batch like Martin suggested then look up the mac address in a text file and rename the workstation as appropriate. It can also name the workstation based on the asset tag.

Check out truecrypt http://www.truecrypt.org open source so its free and should do everything you need.