SmartScreen application reputation

hello, we have several downloaders which bundle software like divx and others with toolbars etc. with IE9 Microsoft added a service SmartScreen which gives a message '"filename" is not commonly downloaded and could harm your computer' right after download. most users cancel installation because of that. we are looking for someone who know how to "game" this problem. Maybe information how many requests a file needs before it's on SmartScreen trusted files list or a different way to find a solution (maybe an universal downloader, which downloads specific files like divx dynamically)