snaffler.exe
Spawn a "runas" box
You'll want to spawn a "runas" command window under the context of your test Active Directory account. Syntax for that is here.
General domain-wide snaffling
snaffler.exe -s -d domain.com -c THE.DC.IP.ADDRESS -o snaffy.log -m folder-to-dump-files-to
Targeted snaff of a specific machine share
snaffler -s -d domain.com -c IP-OF-DOMAIN-CONTROLLER -o snaffspecific.log -n SOME-SYSTEM -m folder-to-dump-files-to