[CentOS] Trying to understand Suspend 2

I am trying to understand Suspend 2 and what I have to do to get it 
working in Centos 5.  There is quite a bit for it at ATrpms:

http://www.atrpms.net/dist/el5/hibernate-suspend2/
http://www.atrpms.net/dist/el5/kernel-suspend2/

The later is the kernel patches that they refer to at the Suspend2 
website, so I don't have to recompile the kernel?

I noticed that over at:  http://www.atrpms.net/dist/el5/madwifi/

There are even rpms for BOTH Suspend2 and Madwifi (my situation, and I 
have been using the 'regular' madwifi parts for over a year now).

So can anyone give me a bit of guidance/confirmation on setting up Suspend2.

Thanks.