Lookup inside a report

Hi,

I'm trying to create a report to generate all the members at a site. The problem is that there are about a thousand sites and so providing a drop-down parameter for the site name is not feasible. I was thinking along the lines of a pop-up window or sub-query where the user can type the site name and search, then select the name from the list, then generate the report. Any ideas on how I can do this?

try writing a web app that allow's for the search and then passing what ever site they chose in the call line to your report.