Ok then, if you already have a patched version then do as I had said to you in #8 ( Forget about # number 2 ). Just start loading GWX with GWX3_Commander_Files.exe.
I recommend strongly while you're in the process, that you carry on your install with SH3 Commander :
SH3 Commander Setup
GWX3 files for SH3 Commander 3.2 Setup
SH3 Commander files for GWX 3.0 Setup
and JSGME :
JoneSoft Generic Mod Enabler Setup
They are a must to my opinion, and it takes secons.
Good luck with your install.