Hello again,
Thanks for the previous prompt reply!
I just had another look at your post.

After Display Message box "The client must be installed to the same folder..."
you have another line..
"Set Focus to Control ID $DESTINATION_EDIT1$

For the life of me I cannot find how to add the "Set Focus" line to the script.
I cannot see it in any of the listed "Script functions" or "Control Statement"

Can you point me in the right direction please!

Thanks
Ian