Hi,
The first thing you have to do is to purchase a digital certificate from a provider.
They will give you two files: a .PVK and a .SPC, which are used in the signing process. You have to enter their location in the "Media" > "Digital Signature" page. For more information on this, please visit:
http://www.advancedinstaller.com/user-g ... ature.html
Please tell me if you encounter any problems.
Regards,
Mihai