Paul, copy of my reply to you on UK e-group
I've been trying to get this to work off and on for a year or so and failed miserably on XP SP3 with all the latest bells & whistles.
Ian started a thread on it a while ago, and from what I remember, no-one got it to work on XP.
I've checked the various versions I've downloaded from a variety of Oly sites; all have the same digital signature & time stamp (10 March 2009 05:43:45), so I think there's only the one version of the codec in the wild.
orfshell from HERE
works with Oly thumbnails when viewing from Internet Explorer, but does not preview when viewed as a filmstrip.
i.e. you can see the thumbnail along the bottom, but get no preview available when you select it.