Working on a custom login interface

Greetings,
I am using RH version 9 (I think) running Fedora Core 4 and using
GNOME. I have written a python program that increases a timer
everytime a coin is deposited in a coin slot. The timer is displayed
in a gui I wrote using Tkinter. The gui also contains start and end
buttons.


The program increments time fine when I use it from a logged in
account, but I want the gui to control account login and logout via the
start and end buttons. I want the program to always be running from
machine bootup to shutdown and I want my programs gui to run instead of
the standard gnome login screen. Any idea on the best way to
accomplish this? Once logged in, the user will have a web browser as
the frontend of my kiosk.


I tried writing a bash init script (Im a newbie) to make my program a
daemon, but it didnt seem to work. Before I spend time learning how to
write init scripts, I would like to know how x-people would solve my
problem. Is spawning my gui as a daemon the best method?


Any help would be much appreciated
Cheers -Jon