Sub packages

[Mixo Shiburi <mixo coza net za>]

I currently have an a rpm package, named 'pack1' (just for aruments
sake). The packed, has package 'sub1'. I would like to add another
packed 'sub2' which only differs with 'pack1' with regards to
requirements and a configuration file. The problem is, that
the configuration file for 'pack1' and 'sub2' have the same name.
What I am considering is, remove the configuration from 'pack1' and
create a sub package 'sub3' with the file, and 'sub2' should be
the other configuration, both will of cousr require 'pack1'. That
removes duplication of file entries, but dow I get 'sub2' and
'sub3' to each have the same file in name only, but different
contents?