You can partition your drive using fdisk, but you will lose everything
Basically, boot form a 98 boot disk, put FDISK you will then get a menu, delete your partition, then create a new one (primary), say "Y" to enable large disk support, when it asks you for the size of the partition, enter like 3000 or 30% or whatever, then create an extended partition, and once you did that, you can create logical drives within this extended partiton.
If they squeeze olives to get olive oil, how do they get baby oil?