Flashy Widget

Not just the Flashy widget but with other widgets as well. How can I display the widget with a Custom Filter. Using the Custom Data and every page has a custom name, now I want to see traffic per page per custom name in a widget like Flashy. How can I do this?

I tried adding this in the widget URL (&custom[page]=page_name) but that didn't work.

Any ideas?

Thank you