Help with GWX 3.0 Vista!

[RM2(SS)]

Hello gents, I recently downloaded and installed GWX 3.0 and i cannot start my first patrol on a new career. It freezes with about 90% of the load screen filled in. I have done the following all twice:

1. Completely uninstalled SH3 (deleted all files)
2. Installed "vanilla" SH3 with 1.4 US DVD patch (that's what I have)
3. I have tried both the "one download version" and the separate files download of GWX 3.0
4. SH3 Commander is not installed.
5. I have been running all programs as sdminstrator
6. I can play the Naval Academy on GWX 3.0

My computer has 2GB ram, and a nvidia gforce 6150

Thanks for your time fellas, any help is greatly appreciated!
Very respectfully,
RM2(SS)