Fool4U - thanks for your help - I'm still shaping the selection assistant with the aid of your email (sorry no reply yet!) but I have to release 'as-is' now before I get crushed under the wheels of progress.
Marking many files instead of one when they are still the same date is an issue I'm working though.
In your latest version is there any way to save and load different sets of search criteria? If not can I do it via the registry and if so what is the key I need to save?