aj906, that version of ati3duag.dll is the wrong one. You need 6.14.10.510.
I posted it to my Filefront page for you. Here's the link...
http://files.filefront.com/ati3duagz.../fileinfo.html
Hope this does it for you.
Otherwise, it's likely you have a corrputed SH3 or GWX install and will need to reinstall the game and mod. Any additional mods you use it would be wise to add them one at a time, start the game to see if it crashes, then add the next mod if everything is okay. If the game starts crashing, you ought to be able to trace it back to the mod you enabled last.