How to enable Tethering 0n 3GS with firmware 3.1.3

Enable tethering on 3GS iPhones, for use with firmware 3.1.3 *ONLY*

Repo: cydia.iphonemod.com.br/

Version: 3.1.3-1
Author: aviegas
Section: Tweaks

Identifier: br.com.iphonemod.tethering3GS.313
Maintainer: aviegas
File Name: .//tethering3GS-3.1.3-1.deb
Size: 351406 bytes
Depends: firmware (=3.1.3)
Architecture: iphoneos-arm