Web developers and designers can also use the Adobe AIR extension for Dreamweaver CS3 to easily create an AIR file of their HTML-based web app. You should have already read Create your first HTML-based AIR application with Dreamweaver from Adobe LiveDocs, installed the Adobe AIR extension for Dreamweaver CS3, and created your AIR application.
You need to first acquire your certificate from a certificate authority as explained above (you'll also have the opportunity to create your own self-signed developer test certificate, just like in Flash and Flex, from within Dreamweaver).
To sign your HTML-based AIR app in Dreamweaver CS:
Select Site > AIR Application Settings to open the AIR Application and Installer Settings dialog box (see Figure 12).

Figure 12. Click Set to choose a certificate to sign an AIR application.
This dialog box should look familiar to you—you've used it to configure your AIR runtime parameters, including window chrome and size, and which HTML file to use at startup. Now, click the Set button located next to the *Digital Signature required label.
With the Digital Signature window open (see Figure 13), you can see where you either choose an already created signature file, like you would have if you procured one from a certificate authority with Firefox as explained above, or you can create your own test certificate.

Figure 13. The Digital Signature box with the option of creating a test certificate or choosing one procured from a valid certificate authority.
That's it, you're done. Test your AIR installation.