Gun Swaping

Hello guys, been a long time. 2 months ago valofe patched gun swaping at combat arms classic [M9 To Tracker knife, etc...] Everytime I swap or edit the M Files [Gun models and such] the game crashes and it asks me to reinstall the client, does anyone know how to bypass that?
Also, does anyone know how to bypass Gear swaping aswell? I think they patched it ages ago [Normal Recon Vest to German Recon Vest]

Thanks guys ;d appreciated