Actually I'm looking to add full instructions to the GWX homepage tonight.
We'll cover:
Uninstalling SH3 fully.
Use of the MD5 Mate.
Installation of GWX.
Installation of GWX v2.0's cfg files for SH3Cdmr.
However, I should add, all the instructions you need for installing GWX are in the manual.
I just have to take care of a small problem.