New patch = No more weapon skins?

I used rezinject on a .dtx dsr-1 subsonic file, injected it to guns_t_pv_sr.rez and it does not work at all, when i try to do it to guns_m_pv_sr.rez (which the tutorial says to use the "T" one) It says the file can't be located.

Any help? Tried this with multiple guns.