I was thinking of a quick way of using dsquery and dsrm in winpe.

First we query domain and out to log.

dsquery computer dc=test,dc=com -name %computername% > t:\dsrm.log

for /f %i in (t:\dsrm.log) do dsrm -s 192.168.1.1 -d test.com -subtree -noprompt %i -u U$er -p Pa$$wo$d 

Best of Luck!