Sorry - seem to have closed the previous project/thread after getting a "your project is being viewed by thousands of freelancers" message. Wasn't clear if this text was public or not!
Anyway, many thanks for getting back. Our requirement is very similar to this application: [url removed, login to view]
There are a number of additional requirements we can go into if you're interested in knowing more but that should give you a flavour of what we're trying to do.