Windows Forms in IE, filesystem access permission, security exceptions.

Hi again,
I searched around here and elsewhere and there isn't much info on Windows Forms in IE :p I'm running into a problem in my file uploader in that I'm trying to open a FileOpen dialog which works fine in the VS2008 environment of course, but when I load the dll in a web page in IE and I try to open the FileOpen dialog it throws a security error. How do I enable/allow filesystem access to the script, I assumed it was a similar mechanism as when a Java app wants filesystem access it asks for trust but its not happening here. I read ways to allow this by manually changing your .Net security levels but thats not acceptable for an end user to do.

This program is using .Net 2.0 and is written in c#.

Thanks,
Sam