Ken,
As I think you have already discovered (!), yes, you can install my RPMs on RH 7.1 (and I have one report that RH 7.0 works too). You need the RH 7.1 PG RPMs not the RH 6.2 PG RPMs, and you will need to
recompile libxml2 for RH 7.1, but my aolserver and openacs RPMs work fine on both RH 6.2 and RH 7.1
There's full info at
http://www.xc.org/jonathan/openacs/whichfilesdoineed.html
But that site is down right now, unfortunately!
