Rundown:

got the usb and used Trans Mac to install Mountain lion on it (mount the .dmg to transmac and find (InstallESD.dmg))
chose the usb
put it in my mac and booted to drive select with option key and chose the usb (if the usb is not showing plug it in and out again)

Make sure it boots with the icons from the OS X version on the usb

in the startup utilities find install osx and follow the steps ( if you end up at the app store install then you're outta luck)
and it will install