I'm completely lost with this one.

I'm probably in the wrong forum, but here it goes...

I want to create a program or some kind of library that allows my web page (ASP.NET or PHP) to communicate with the visitor.

Basically I want to create a content downloader that doesn't require the user to save the files to the directory it will install and download the file my from my ASP.NET page to a specific location on the visitor computer

(This is for video game content downloading)

I know it sounds confusing.