He means how will it work. Amir kACARS is linked to phpvms so a pilot is registered on your virtual airline can download kACARS and then login with there pilot id and password, enter the flight number and then search for the flight all the information will then fill in and its as simple as pressing log flight and then when done stop flight and file pirep. It is the best free software around for phpvms and Jeffrey does really, really good custom built versions on his website fsproducts. You will need a phpvms website however to use kACARS. I will help you with your project AMIR.