CentOS - Mar 2011 - rpm split

Hi,
I have a custom rpm for our application. The problem is that it grew old and
fat. It's about 30 MB. So i would like to split it into two parts. One big
part that almost never changes and one smaller part that is changed more
frequently. But i don't know how to write the spec file so a simple yum
update will install both packages and it won't create any problems.

Any suggestions?
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>But i don't know how to write the spec file so a simple yum update will
>install both packages and it won't create any problems.
A few options here, create a %{name} .spec with:

# This is part one, or the main component
%description
%files
...

%package part_two
Requires: %{name}
...
%description part_two
Smaller part of %{name}
%files part_two
...

Check an example out, one I was using recently to build another was:
https://git.icinga.org/?p=icinga-core.git;a=blob_plain;f=icinga.spec;hb=HEAD

Hth,
jlc