Try Googling for it - I did find it once a while ago when I was looking at doing it before I got my G4 upgrade, but I can't seem to find it now. There is a patcher but that is only for 7.0.1, which you can't find anywhere (you need Toast 7.0.1 for the patch to work, and that is a superseded update level so is no longer around for updating a copy of 7.0 with), but I seem to remember seeing some instructions for hex-editing any version of 7.x as well.