rh7.2 doesn't come with ximian, so i think u no worries about that. during installation, you can select individual packages. just ensure that nautilus and galeon are checked. if not, no worries, just get the rpms from
www.rpmfind.net and install the packages. or slide in your rh cd and rpm those packages in.
alternatively, u can try downloading the tarballs and gunzip, tar, configure and make...
but it's a could be a little tougher this way...