Custom fields in Google Calendar

So, I have copied this from a previous post. Please forgive me if you are the author but the requirement is almost a CC of mine. I am looking for a sample application/gadget that enables the user to select items from dropdown lists from within a Google Calendar event. Process: 1. User opens their Google calendar 2. User creates an event - i.e. drags a new event for Tuesday, 10AM to 11AM. 3. User edits Event detail 4. Event detail screen opens, User adds a description, invites others etc 5. User also selects values from custom dropdowns from within the Google event detail page 6. User saves Event The Process above is a mandatory set of steps - this must use a standard event taking advantage of google drag'n'size'create functionality. I see step 5 as the 'not yet possible' step. The data selected within the dropdowns can be stored elsewhere - i.e. not within the event - I see that storage process happening on the save of the event, or even as a by product of selecting items from the dropdowns - again that would be a webservice call. I must stress that a full end to end working solution is not a mandatory requirement (save data to a local file if you must) - my primary goal is to get the Google Calendar Event customisation sorted - i.e. showing the populated drop downs on the event detail page. (What about embedding an IFrame into the Event detail page - as long as the Event can be tied to the IFrames contents, that too would be acceptable) Please feel free to seek clarification. I will require full source code of any solution. Anyone who is unable to string a sentence together with the correct use of grammar will be ignored. (I don't see this project staying open for 60 days, but it might take that long to find the right person) Thanks!