It can be done as a standalone projector file with FS commands. The command is FScommand:exec in the Get URL and then the Path of the program in the target (Some problems here- the target area does not allow much room- perhaps it can be expanded- I have fiddled with the Fun file in wordpad and have gotten it to work for longer paths).

There are also several apps that will autoluanch programs. Juglor is one and there is a free version up in stand alone and 3'rd party tools forum (One of the moderators wrote the app).

Here is some info on signing files:

http://developer.netscape.com/docs/m.../trust/owp.htm

http://members.aol.com/EJNBell/pgp-www.html

Please note that the second listing is PGP and although legal in the US it is not legal in all countries (like France, China, Iraq, Iran, and Russia).