amateurModder

Hi there,
 
I'm an amateur modder, with no expirience, and i just wanted to make a custom ped moddel for GTA5 since there was nothing for my own taste, but now facing some issues.
I have added the task_000_u folder and odr file extracted from the vanilla cop model and added them to the modifyed modell and also written a path for it in the odd file (custom modell). Afterwards added the textures from vanilla cop modell. (The mesh is the cop radio with holster - its not locked, since vanilla an not modded).
 
In OpenIV it is everything ok (PIC1). Open in Game - not ok (PIC2). Even adjusting in clothes menu in Trainer it won't show up. (OpenIV - no errors , no locked meshes etc. )
So where do i mess up or what am i doing wrong (generally)?
 
As i said im pretty new to the modding so sorry if it's something obviuos, i appreciate every help!
P.s. i searched around the forums but did not find any helpfull info.