[CentOS] Custom SELinux file contexts?

Hi.

Do anyone know of some place to put custom SELinux file context 
specifications? I would prefer not to append lines to

/etc/selinux/targeted/contexts/files/file_contexts

but rather put one or more similar files somewhere. A file_contexts.d 
firectory would be nice, but it isn't available. Just creating your own 
file_contexts.local file does not work, I already tried.

I'm running CentOS 5.1

Regards
Ingemar