I don’t like IE8 (*), but for a customer of mine I had to create the xml for an accelerator.
See here for more info:
- http://www.prometeo.de/2008/09/internet-explorer-8-accelerators/
- http://msdn.microsoft.com/en-us/library/cc289775(VS.85).aspx
- http://msdn.microsoft.com/de-de/ie/default.aspx
Now the point I created this blog entry: Use always the same url! Use e.g. http://www.metapartei.de in <os:homepageUrl> AND in ALL the action attributes of <os:preview> and <os:execute>. Otherwise you cannot install it.
* Why I don’t like it? I don’t like IE in general, because
- it has no firebug
- not standard conform(although Firefox isn’t too)
- no such innovative like opera…
- it comes from MS
Karussell 
If you want that your accelerator appears in the menu (context menu) which pops up on right click, specify context=”document” in the tag. Another value would be link.
See here for more information http://msdn.microsoft.com/en-us/library/cc289775(VS.85).aspx