Do cross mods still work?

I was thinking of making a cross mod for myself, making the M16A3 into an UZI. Here's the link to the instructions I'm using: http://www.mpgh.net/forum/211-combat...-crossmod.html What I need to know is: Would these instructions work in helping me cross mod the M16A3 to an UZI, or has the patch removed the option of cross modding my own game entirely? Also, a method i thought of to bypass that is 99% bound to fail: Can we just inject the files into the game files, delete the original, and rename the new .rexNew file to .rez? or will this not work?