Ok, guys... As far as I'm here I'll give you everything I know...

1) There's a C++ sourcecode and the compiled exe in the attachement. It's a PoR map extractor. Anybody who is familiar with C++ could get some logic from there for the discussed task.

2) The extractor produces a set of tiles (don't remeber exact dimensions - possibly 256x256). They are ordinary .jpg's. The rest is up to you - tiles should be merged in some way to produce a full map background. I did that manually in Photoshop for all maps. But it could be automatized by the means of additional coding.

3) PoR map in-game appearance is a mix of background graphics, a set of 3d-animated objects and applied lighting effects. So it's just impossible to produce any decent results via SS-ing....

4) I don't know how to extract PoR 3d-models and where to look for them.

Supposedly, they originally came from King Diamond, but he seems to no longer be around to ask, and is rumored to be extremely hard to contact (but I am trying).