ok there is a way to have the user install programs from the browser instead of downloading it first...
thats how users install plugins, adobe flash updates, java updates and etc...
so i think u should be able to probably use javascript for this correct...
i know i have seen it because thats how this flash update and java virus is being spread.
because even if the .exe is malicious the browser will still let u install u just get a warning and click on the confirmation and run...