RPMForge mirror creation (yam?) howto?

   I'm considering setting up a local [distro-specific] mirror of 
FR/DAG/AT/etc.  I know this has been covered before, but now I come to 
look for the details, I can't see anything obvious.

   Is there a brief how-to for this anywhere?  Is it 'yam' I'm looking 
for?  Do I aim to mirror the repos. individually, or it there now a meta 
RPMForge repo.?  Any ideas on how much space is needed?

-- 
[neil@fnx ~]# rm -f .signature
[neil@fnx ~]# ls -l .signature
ls: .signature: No such file or directory
[neil@fnx ~]# exit