Well, seems that you've been reading this HowTo, this is a good beginning. If you couldn't find your answer right here, you should try in order:
The official RPM-HOWTO (installed along with your rpm program on your system).
The book from RedHat Maximum RPM is available at http://rpmdp.org/rpmbook/.
Post a question in the mailing list rpm-list you subscribed a long time ago at the beginning of this howto.
Drop a line to Mandrake's Quality Assurance, <qa@mandrakesoft.com>.
If you feel that the information you found may be useful for others, in the scope of that document, feel free to submit your proposal to the maintainer of this document.