I am again disabling the use of Default Half-Life 2/Gmod Player models for all non-staff members as they are not compatible with the custom animation system. I do not feel like it would be worth anyone's time if I made a huge list of things you can't do while using the models as I do not have faith in players to responsibly remove them when it is required and I don't want to give the staff team another thing to police.
Thus, until I make a system to automatically revert people to Fallout models when doing actions such as entering combat, looting suitcases, scavenging or healing, players will not be able to PAC themselves as default Gmod player models.
I am not rescinding this decision, so the best thing you can do is wait for the model reversion system. Sorry.