Ide Expansion B&w G3, Can I add an additional ATA-100 HD Options

[Jerald]

I have a B&W G3 300Mhz w/ the original IDE 6GB HD, that is being sent to me. I also have an extra 40GB HD that's ATA-100 7200rpm, that I would like to install onto this system, once the computer arrives.

Can I just add the extra hard drive? Or do I need an additional IDE Controller card? If so, which is the right card?

I have a PCI serial port card (for hooking up a MOTU MIDI Timepiece AV serial), an Adaptec 2904 SCSI (for hooking up an old CD-RW), plus the Digidesign 001 PCI card. I don't think I have another PCI slot for an IDE controller card.

I really appreciate any help you can provide. Thank you in advance.