mods not working now.

There was just a 6 hour patch, and just before i had edited the in game skins of the ACR and a few melee weapons, after the patch, i re-injected the moded skins into the .rez and still it doesn't work. do i have to re-extract the new ACR .d.xt, re-mod it, then inject the newer model .d.xt?

What do you mean "weapon skins"? Do you mean texture mods?
If you do mean so, are you sure that they are in the game folder? every new patch, everything in the game folder is deleted and replaced with brand-new files...

Don't inject it, put the files into a folder named "GUNS_T_PV_AR" inside a folder named "TEXTURESCRIPTS.rez" inside of your Game folder...
I don't think texture mods work anymore the way you stated.