Of course rather than create yet something else that is running all the time, setup your VI to only execute for the desired amount of time, If you running windows you can use the task scheduler to launch it.
http://support.microsoft.com/kb/308569
Puts the burden on the OS and is not dependant on you starting it everytime you reboot, or having to put it in the start menu. there are options for it to run even if you are not logged onto the system.
Although not absolutely certain, I am reasonably sure that mac and linux also have something similar.
Paul