for the client part several rpm packages exist at www.mandrivauser.de (should work with 2007.1 too) thanks to Florian aka doktor5000 from the MUde-rpm-team
for the server part there is the hard way and the easy way. The easy way is to use the server rpm package 'gnumed-server'
Installation und Starten von GNUmed auf Mandriva
Eine Installationsanleitung befindet sich im Wiki von Mandrivauser.de