A poster asked how to customize a hundred nearly-identical systems;
this is a lot like my environment.
We have a single kickstart template, and only the mountpoints differ
on a per-system basis.
The post section includes:
SNIPPET::config_mounts
Instead of a single snippets/config_mounts script, there is a
directory at /var/lib/cobbler/snippets/per_system/config_mounts ;
inside this directory is a script snippet for each system, with the same name.
More info on the cobbler wiki.