@Webster, try it and see, just copying over the top SHIII will still use, by preference, the SHII tga files. To get the SHIV water I think only requires a few SHIV Misc files, but at this stage unless we can get the scene.dat edited to suit SHIII then I think it's a lost cause.
Can anyone tell me where to get the dat file editor, what do people like Seeadler use to edit this file, surely not just a hex editor & guess work!!

Wish I could get a hold of Kashmir!