DO NOT use the 4GB for your primary drive....it is probably much slower than the 13Gb drive.....
setting this 4gb drive up for apps and data will slow down just about every aspect of your system.....
Make the 13GB drive primary, 4GB drive secondary (d

, using FAT32.
Use the 4GB drive for backups and storage of files you don't need much....like drivers n' stuff.
This my personal expience speaking, and support experience.........good luck!
At the very least, put each drive on it's own IDE channel as primary...make the CD-rom/zip/DVD the slave....
EDIT: badthad, I checked that link to partitioning recommendations....I disagree with his suggestions....two key points I quote: (he says to make 3 partitions on the drive).
1. "should your C: drive become badly corrupted, you can format C without losing your data!" Ugh, if the c: partition beconmes corruptetd, the other partitions will likely fail as well....the partition info is all stored in the same place...one goes, all three will likely go.
2. "The final partition or E DRIVE will use the 1 GB you saved back. This partition should be used for the "swap file" or...." This is sooo wrong minded. By putting the swapfile out on this partition, it's on the slowest part of the HD (1/3 less throughput..varies by drive)....and the heads will have to seek a full stroke everytime they need data further slowing down the HD. Keep swap on primary drive, set mininum size to like 128mb, max to whatever ya have. It's a good balance between static and dynamic....
Yeah yeah I"m not in a good mood.....tough
