Thanks for all your answers
After loads of trawling I have found out that the Select button allows you to turn on with the modchip enabled.
Why is there such a lack of documentation on this? I don't understand why the team Xecuter website does not appear to have any detail on it at all.
Anyways I have found out the answer anyways. It's still a shame that this could not have removed the need for the DVD dongle.