<< REMINDER:
Make sure that you don't create a shell script name that already exists on the system, otherwise you will be executing the first one it finds from the PATH, and it might not be the one you want to execute. >>
Actually you can get away with that, not that I recommend it. The $PATH will look in each directory in the order that they're in. So, if you put /home/<user>/bin first, it will look, and execute, anything in that directory first.