Use CloneCD for 1:1 backups. I checked and your writer is perfect for it.
www.elby.de
30002/3/4 v1-3 = 10 Screws on base of PS2
30002/3/4 v4 = 8 Screws on base of PS2
30002R/3R/4R v4 = 8 Screws on base of PS2 & 2 screws in upper rim of expansion bay
30002R/3R/4R v5/v6 = 8 Screws on base of PS2 & 3 screws in upper rim of expansion bay
39002/3/4 v7 = 8 Screws on base of PS2 & 3 screws in upper rim of expansion bay
(credit to charlie/crazycowpie/stonegreg50 for the above)