I've got a QS 933 G4. I've got two HDs in it already. I've got 6 external FW drives attached to it. Personally I'm sick of the deskspace and plugs I've got to dedicate to the externals, but I devour HD space like crazy. I just got a WD 200 Gig HD and it came with a PCI drive controller card. If I were to use this card, can I add another two internal HDs to my computer? Will it overload the cooling capability? Where in the computer would the extra drives fit? Thanks.