Disclaimer: I am not responsible if you pickle, blow up, or turn your phone into a very expensive paperweight. You should have a good nandroid backup as usual.
This is a metamorph theme for the wireless tethering application. You need to move the .apk file to the /system/app/ folder, and rename it to "Tether.apk" Without the quotes in order for it to work.
Download Here: 4shared.com - online file sharing and storage - download MenaceTether.zip
Post here or PM me if you have any questions or suggestions.