There are a couple of different ways you could do it. One way would be to build a web-based application program and then just run a browser in kiosk mode on the lobby PC. Kiosk mode gets rid of all toolbars and anything people might be tempted to click on -- it's your web page and nothing else on the screen.

Internet Explorer in kiosk mode
Opera in kiosk mode

By making it browser-based, you can make application submission nearly idiot proof -- the whole thing could be "fill in these boxes and click submit". You wouldn't need to worry about the person saving stuff in the right format and right location, or messing up programs on the computer, or whatever else.

The trick would be getting someone to code a web-based application submission program.