[CentOS] %include command in Kickstart

I have a kickstart file that basically runs the following:

   install
   nfs --server=nfserver.blah.local --dir=/vol/updts/staging/CentOS_4.3
   #include %some_file.cfg

I want to be able to access or "include" a file on the nfs share not the local CDROM I've got this on.  How do I do that?
   === Al