It didn't work for me, I added the texture into the .rpf file then dragged it onto ArchiveFix to re-encrypt it then dropped it into the Rage MP Folder along with the other mods that work from your mediafire . Then, when I head in game to the clothing I tried to re-texture, it doesn't show up just the same default texture.
Edit: Nvm, just saw the thread Firesky posted and missed steps. Will re-try again today.