I can't seem to want to let go of the project. I'm still working on finalizing the Szlacta's normal map so that I can complete that character.
After that, I'm not quite sure how to proceed. Blender doesn't have a fully working exporter for Source games, so my option would be to use the XSI mod Tool, likely in a virtual machine.
That would take some time as I'd need to get used to XSI's controls, but at least for me the project ain't quite dead yet.
I figure if I can get enough reference images, I could try and build a basic version of Prague. Maybe just blocks as placeholders until we get proper buildings.