detect application quit

is there a way to detect when an app quits?

i’m writting a script to launch unreal tournament 2004 without needing the cd in the drive every time i start it.
so far i have:


tell application "Toast 6 Titanium"
	mount image alias "Recoil:Users:tristan:Documents:ut2004nocd.toast"
	quit
end tell

tell application "Unreal Tournament 2004"
	activate
end tell

one possible choice i suppose (which may work) is to just write a timer to wait like 10 seconds then tell the finder to unmount the diskimage.

is there a simple timer mechanism, if no one knows how to detect app quits?