Well, you would partition the drive (create a partition from unused space) using either fdisk or cfdisk.
When you create the partition, you can specify the file system type. Here, select FAT32.
Then, to format the partition as FAT32 (commonly called VFAT), use the command:
"mkfs -t vfat /dev/hdb1"
Replace /dev/hdb1 with your partition name/number. Take a look at http://www.linuxquestions.org/questi...ticle&artid=41
for more information.