System Specs are required mate.
GWX 2.0 loading will take approx: 5mins, with the following specs:
P4 3.4GHZ
1 GB Ram
The rest is irrelevant when loading times are involved (expect maybe HDD speed). If you are even close to this, you should not be taking 15 - 20 mins.
What will increase load times is TEXTURES as part of 3rd party mods. SH3 will load all textures in the TNORMAL folder before the game even starts.
Also, make sure your HDD is defragged.
