I'm not sure if you need to choose your timetable on enrollment day or not... I wouldn't think you had to, but then again, maybe they need numbers for the tutorials and workshops, ect?
I don't know if I did it right but mine worked out with no classes on friday (woo hoo !) finish at 4 on monday (with 3 hours of breaks), 1 on tuesday (1 hour breaks) start at 3 and finish at 5 on wednesday, and finish at 5 on thursday, but with a 5 hour break between a lecture and a tute...
all sounds good, except what am I going to do for the 5 hours?!