Contrary to other opinion here, I really think doing anything with RH 6.2 is counterproductive.
The only real reason to get RH (or Mandrake, or Debian for that matter) is you buy into the package system of choice. RH 6.2 has old rpms, an old RPM and it is really not easy getting new rpms to work. You have to upgrade to 3.x RPM, oops that needs glibc 2.2, oops need this and that. If you want a dummys guide to openACS you really should dump 2 year old technologies. A lot changes fast.
The main reason not to use RH 7.0 was the pain of Oracle install. I have been using RH 7.0 since the day it came out (with ReiserFS also) on many systems and if you understand linux you can get Oracle up and running with basically little hassle. Everything is completly stable and of course you will be recompiling a new kernel anyway. Since many users here won't be running Oracle at all it is really a moot point.
If I ever can download 7.1 I will update my doc for that.