1. Can I "guide" Kickstart to lay out the disk the way I want? Or would I need to run fdisk in the %pre section to gain that much control?
If you need full control I would suggest sfdisk. Partition one workstation by hand to get the output and format the disks in %pre.
You can use --onpart to place the mountpoints on the right partitions. This is a bit low level but worked fine for us. cu Florian Festi