Hey ive always been using mint with a different menu than the default ubuntu one, but ive recently moved to ubuntu to test it out even though its pretty much the same, and i was wandering how i can create launchers on the menu bar, like backtrack to run scripts like nmap

The problem i have is, if i put a simple launcher like "nmap" the script will run and exit immediately, the only way i can think of keeping it open is


But thats so impractical, i must be missing something! Basically i wanna know how to add custom menu items like in backtrack to the standard ubuntu menu,