I need to insert the "internet Explorer engine" as graphical-componet in a Flash Builder application using Adobe Air2 libraries. I've tried with HTML-component but it doesn't work properly for my purposes because I need a activeX-plugin wich is done only for Internet Explorer.
Is there any way to include it?
No. In AIR 2, HTML component would be the way to go.
You can always create your own native binary and talk to it using NativeProcess though. But I'm guessing that is not what you have in mind.