Back from vacation. Sadly still no visible progress. I've done a fair amount of code replacement, replacing Windows-specific code with platform-independent versions of the same code:
Replaced D3DX math code with CML math code (http://cmldev.net/).
Replaced D3DX model-loading code with AssImp model-loading code...
Replaced D3DX math code with CML math code (http://cmldev.net/).
Replaced D3DX model-loading code with AssImp model-loading code...
Create a custom theme

