I think the .ini I provided is the default that sources have with the audio part changed that failed on my system (and PC too).

Using a PC .ini from old CD game or whatever place it didn't work with postal open source version, but anyways is a matter of parameters. I used whatever worked at that time.

The demos have a path problem but they are really like 30 seconds of not much to see. Worked for linux but oddly enough the linux version I compiled is very unstable.