I'm trying to make a gui sit on top of the host window but as the documentation says - "Currently its not supported to set Client window on top Host window."
OK - all seems fine now after reinstalling to C: - and unpacking the archive as before into the \ Lib - so not sure what was happening but thanks for all the prompt help.
I've been trying to use the Dock function (http://www.autohotkey.com/forum/topic19400.html) and have installed that and all accompanying files to the \Autohotkey\Lib When I try to run the test.ahk or ...