Yep.....you can add a pci ide card to your system,they give you 2 new ide slots,so you can connect 4 devices on it.....
Older Promise Ultra100 TX2 model didn't work that well with burners,because the card confused some burning programs....
I suggest to use a newer model,or another brand...
If you can only find the Ultra100 TX2 at your store,I suggest you to connect your harddrives to it,and your burners to the pci slots on your mobo.......
My setup:
Maxtor 20 gig ........both connected on my Promise Ultra100 TX2
Maxtor 80 gig
LiteOn 40X
LiteOn 52X ........ all 3 of them connected to my mobo's ide channels
Sony dvd burner