Ooh, that sounds fascinating, Moomin! :) It's a really interesting challenge to try and get into the head of someone in troubled circumstances, though it can be so difficult to do well. Good luck!
I did have an XBox 360, but it cooked itself. I jumped ship then to PS3. I'm more of an RPG fan, currently playing the Kingdom Hearts 1 re-release. Very happy to hear Kingdom Hearts 2 is being re-released as well next year. That gives me something to do on maternity leave. 
Far as I understand the Glucose Tolerance Test basically is testing how well your body reacts to being overloaded with sugar. From what I've been told, you have to fast from the night before and then head into hospital where they feed you a sickly sugary solution on an empty stomach.
They then test your blood repeatedly over the next few hours until the blood sugar level gets back to normal. That then indicates how well you handle sugar and gives an indication of whether diabetes is a problem.
Disclaimer, I've not had it done before and all my info is second hand. So I've no idea if it's accurate or not! Hopefully someone will come along shortly who has had a GTT before. :)