[CentOS] rpm spec question

Hi

I am trying to package a bunch of files so that i can deploy them with 
rpm - Its prtty much just a case of dumping some files on the filesystem.

I achieve this with rpm without issue however when i remove the rpm from 
the system it also removes the dir that contains the files, even though 
i dont specify this in the %postun. Is there a way to tell rpm to NOT 
remove files/dir's that it creates unless i request it?

thanks