[CentOS] downloading an src.rpm?

Mon Sep 10 14:52:21 UTC 2007
Dave <dmehler26 at woh.rr.com>

Hello,
    I've got the rpmforge repo configured as a 3rd party repo. There's an 
rpm that i'd like to get the coresponding src.rpm, install it, and recompile 
it. How would i do this with yum?
Thanks.
Dave.