Many thanks Blink,
I went throught the aums looking for 'climbing', but must have missed 63 - well done you for helping. It works just fine, except where you have to put in the 'x' value for moving off the top of the ladder - I put in the value, build, save etc, but it won't stay put!! when I look at the value, it has gone back to '0'. Must be a fault in my copy of the prog.
Once again, many thanks, David.

PS
Where are you in USA? We went to California back in '86 - LOVED IT! Yosimite blew me away! (still floating!)