No. You could consider ditching the CD writer because, presumably, the DVD writer will also write CDs.
If you don't want to do that, you can get an IDE card, which will give you two more IDE sockets (4 more drives) for about £35. I'm using a Maxtor card, and am very pleased with it. (In my opinion, don't be tempted by a card which also gives you RAID functions -- just a simple IDE extension is all you need.)