the pass code is 0ne of these 3 codes for the B2F area 3555 5315 8211 Roof top is always random 1 code is 0930. I cannot garuntee these will work. when doing this you should bait the leech man with a blood infusion pack for he appears in this room alot sooner than any other rooms for some odd reason(this will also get the leechs off the control panel if u dont have time to deal with them) any more help just post. JSG out
(source=stragetgy guide:P)