Adding a second drive just for the swap disk can be a good idea. I heartily recommend partition magic, or if you feel adventurous, a Knoppix live disk can do the job if you want to experiment with Linux.
Make sure that the partition or the second drive that you assign as your swap is not shared, or networked. That will increase the performance as a swap.
Lastly, add as much RAM as you can.
I went from 2 gigs of ram to 4 gigs, and I noticed an immediate speed up.