FreeNX is the fast X11 remote desktop protocol which runs over SSH. To install it on OpenSuse 11.3 is very easy.
Go to the build service for FreeNX
Then click on "1 Click install" and follow the prompts.
After the install run:
nxsetup --install --setup-nomachine-key
If you are running a 64 bit OS then run the following:
and run the install again.