[CentOS] RHEL4 - which yum version?

I'm looking at this document to convert RHEL4 systems to Yum and setup 
an updates repository.

http://sial.org/howto/yum/

Which version of yum would you recommend for that? What would be the 
dependencies that need to be installed? Any guidelines for installing 
Yum on RHEL4 without breaking the RPM dependencies and stuff (and with 
minimal changes to the system)?

The document recommends yum-2.0.7, but that's pretty old, I guess.

-- 
Florin Andrei

http://florin.myip.org/