Native Windows RAW Image Viewer
Microsoft has a download for viewing RAW files from some digital cameras without the need for an external application. RAW Image Thumbnailer and Viewer for Windows XP Just gave it a quick test and it seemed to work fine. I don't think it alters the RAW file in anyway so it should make it easy to sort images before running them thru PhotoShop. Of course, I use Breeze Browser most of the time anyway, but it's nice to have the option.