well this can be useful when a model is causing consistency errors in a server, you can do this or just put mp_consistency 0 in the server.
Notes:
-when you are rigging a P_model almost all P_references use the "line03" bone, although it can be "sg552" or any other, usually the last bone is the one you need
Once done delete the default p model reference.
-you not need necesarilly put the reference as "1.smd" and edit the .QC file! just overwrite the original reference and just add the textures.
Oh Yeah !
My p_mp5 Work, ANTICHRISTUS I miss this shortmessage >.< Thank you friend.