define network in kickstart pre script

Hi.

I've looked around for this, and am continuing to look for an example.

At the install prompt when you run 'linux ks=http://website/ks.cfg' and you
do not have DHCP available you are prompted for network configuration (or
you can provide via options).  The IP address at this point is strictly for
the purpose of getting the kickstart file (from what I've experienced).
Once the kickstart is downloaded the network configuration inside it
overrides the local system.  My question, since I know you can access the
network during the %pre script, is can you setup a script in pre that will
take the IP configuration initially provided for the ks.cfg download, and
somehow configure the IP configuration for the rest of the process?

DHCP is not an option for our environment.  At the moment, if I can't
figure this part out I was going to setup a perl script for the purpose of
parsing the requested url aand handing back a re-written kickstart.

thanks

greg