You may want to contact Josh directly via PM as your issues are not to do with this modification.
The post I pointed you to has an altered product file which allows users of detected mobile devices to change to other styles if they wish and thus over-ride the detection/style enforcement.
This seems to be the functionality you were after?
eg:
- Mobile phone user logs on, gets mobile style.
- They can then choose to use any other style they want and will then be presented with that style from then on.
- They can also choose to switch back to the mobile style if they wish.
- This is device based, not user based so the same won't happen if they log on from a PC.