Download the rpms you want from this group...
http://www.usr-local-bin.org/mozilla.php
probably just
mozilla-1.6-100.SuSE.ulb.2.i586.rpm,
mozilla-calendar-1.6-100.SuSE.ulb.2.i586.rpm
mozilla-mail-1.6-100.SuSE.ulb.2.i586.rpm
Fire up
System-->Configuration-->Kpackage
File-->Open, select the RPM and install
It should be self explanatory from that point on, but post if there are any problems.
RO
Edit: You don't want any of the .src.rpms :edit