search for: webdialogs

I have a question, some applications register their own "custom protocols", instead of http: it can be for example skype: or skp: . Google SketchUp for example uses skp: to communicate between javascript in webdialogs and its Ruby scripting language. At the moment, I have installed Microsoft's IE8 (otherwise I haven't got it to work). For various reasons I would prefer Wine's own browser with Winegecko instead of IE8. So the question is: Is support for custom protocols not yet implemented in Wine...