Redux & W7...

[Nagnar]

Okay I've tried that and some other combinations.
So this is using a copy of my Vanilla MTW folder and my Redux folder. The results are all when entering the campaign map, everything else works fine under any conditions.

Vanilla MTW:
without ddraw.dll - Works
with ddraw.dll - Works

Vanilla MTW + Redux MapTex2.tga:
without ddraw.dll - Works
with ddraw.dll - CTD

Redux
without ddraw.dll - Works
with ddraw.dll - Error and crash to "In-Game Menu"

Redux + Vanilla MTW MapTex2.tga
without ddraw.dll - Works
with ddraw.dll - Error and crash to "In-Game Menu"

-Nagnar

Edit: I found the answer after doing some replacement of individual files in Textures/campmap. Both MapTex.tga and MapTex2.tga cause the error and crash to menu both independently and together. Unfortunately though, Its unplayable with Vanilla MTW's copies of those files as many provinces and sea regions in the campaign are inaccessible.