Missing application icon in the customize dialog

Hi folks, this is my first post to this forum.

Background:
I and my company has an application for updating there homepages directly in Internet Explorer. It works well in IE 6, you start the app by clicking on the icon in the toolbar.

The problem is now in IE 7, the application is still accessible through the View/Explorer bar. But the icon is missing. And the icon is not available in the Customize Toolbar dialog.

In IE6 I have this in the registry to get it to work:
[HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer\Extensions\{4C1A4A92-7CB2-425a-9E4B-665BAED90D27}\]
"ButtonText"="Portello"
"Clsid"="{E0DD6CAB-2D10-11D2-8F1A-0000F87ABD16}."
"ClsidExtension"="{03BD04A4-2A5C-49AE-976F-4C265CD05AF1}"
"HotIcon"="c:\\Program\\Portello\\col.ico"
"Icon"="c:\\Program\\Portello\\bw.ico"
"MenuStatusBar"="Portello"
"MenuText"="Portello"
"Default Visible"="Yes"
"BandCLSID"="{5BDD0260-5582-45A2-8774-3C42018843D6}"

I wonder now if MS has disabled this feature in IE 7 or there is a new way to do it.
Is there somebody who has a solution

Thanks in advance

Torbjorn Hakansson
Developer for Portello
http://www.portello.se