Hi - sorry for late reply. Bought a new PC yesterday and it took most of the day to move the old one out/redrill holes for shelving etc etc.
Anyway, it sounds as if you MAY have the clips on your machine. Are you running Vista? It sounds as if you may be from your description. I've only just up(?)graded to Vista, so I'm not overly familiar with it (and where I work refuses to upgrade until the first service pack is released), but it seems to run pretty much the same as XP (just flashier).
Run the search again and look to see what extension the un-openable clips have (if it shows). Some cameras record in .avi or .mpeg, which you should be able to play in Windows Media Player. If you right-click one of the files and select "open with" and "Windows Media Player" it may work. If you do not see WMP as an option, choose "other program" and you will get a list of most of the programs on your machine; you should be able to select Windows Media Player.
If the extension is .mov, or the above does not work it may be that you need Quicktime, which is another format many cameras record clips in. It's a free download from
http://www.apple.com/quicktime/download/ . Unless you WANT iTunes, I'd advise just getting the "Quicktime Only" option. Once this has been installed, try "open with" Quicktime.
The program I used for my "slide show" was "Photostory 3". It's a free (with genuine Windows) download from
http://www.microsoft.com/windowsxp/using/digitalph otography/photostory/default.mspx - I'm not sure if it works on Vista yet! You have to save the file and then convert/burn it in whatever burning software you use.