Thanks Brian,
I'm so glad I'm not the only one! A-Camera's setup was so simple and easy to understand. I should have a look in the UCCNC forum as well. There must be a simple explanation somewhere of what to enter in which boxes.

One of the error messages I got while trying it was "The P1 value cannot be zero". There's no explanation of what the P1 value means, the problems are that basic! With P1 set to 1 it said it was probing but nothing actually moved.