im pretty sure that all diamonds have the built in 4g mem card. if this is true he can download ppcPimBackup. I have been using it as long as i have been flashing. then you can flash from the 4g memory as described in the thread
http://forum.ppcgeeks.com/showthread.php?t=40490
the cab for pim backup can probably be found by using the search method in the MR4 forum.