zman: Oh my... unfortunately it's weekend for now, but I'll check this out at monday, as soon as I'm at the office!
Frank: thanks for your comment, I tried the OSD but the script failed somewhere in the middle 
In addition, McAfee seemed to block the ldprovision.exe process, so now I'm not sure why the script stopped. Hopefully you can guide me in the right direction wednesday when you're at our site 