OK, I have split and moved the topic. I hope you (DeUgli) will find it here
Simply unzip wq3_b22_sa_engine03_game01.zip and run wquake3 (without any extension) that is inside Westernquake3. With that you have an early version of beta2.2.
To get the final beta2.2 you need to unpack e.g. wq3_b22_update.zip inside Westernquake3 (and let it replace e.g. wq3_pak3.pk3).