MKI MR2
MKI T-belt
The MR2 timing belt is a notoriously difficult task. However it is not nearly as difficult as it is time consuming.
Here is a diagram of what you actually have to do (SC cars and AC equipped cars have additional belts, pulleys and idlers, so what!)
In addition to what you see here access is a nightmare and you have to remove one of the motor mounts (it is obvious which one)