HL uses a unique WONID for each running copy based on the serial key. You cannot share a CD key, only one player will work, just buy a copy for a tenner.
DPB 2.1 does not support HL2 as far as I know. I use HL Viewer to decompile the models, then potatoshop to edit the images (I am dumb, so basical copy and paste photos of the markers onto the bodies)
Same goes with the player models, but I had to take pics of my cleats to get them right
when i try to play dpb it says my hl excubate is out of date anyone knows what this means, oh then it says download current version or something so i try and do that and when i try to download it says current version is up to date ???????