I have a script application and i want to know how to modify it.

I want to:

Change the language written at the top left(next to the apple) when the application is set to run.

If possible, i want to be able to have it not prompt with "Do you want to run this script" after double clicking.

And i want to be able to attach it to a .dmg file so that the script runs automatically(on any computer it is used on) when the .dmg file is run.

i would basically want to make the script application be invisible, but do it's job when the .dmg file is used.

Please help. Thank you.