I have a couple lines like:
>
> part /     --ondisk=sda --fstype ext3 --size=20000 --asprimary
> part swap  --ondisk=sda               --size=4000  --asprimary
> part /home --ondisk=sda --fstype ext3 --size=1     --asprimary --grow
>
> in my kickstart file.
>
> Is there a way to have 1 kickstart file that works for hda and sda both???

If you only expect to have 1 drive in the systems you're installing, you 
can just leave off the "--ondisk=".