You can find IrfanView on the net. Useful free browser software which handles .crw files. There are also free plugin utilities which add .crw functionality to Windows XP file viewer. One is called CRW Thumbnailer and there is a second, more prefessional feeling one that I can't think of the name right now. Trouble is that they work for a little while, then stop working (on my system at least) so I have given up on them - bit like transplant rejection. I'd stick with the Zoombrowser recomendation, use Irfanview or consider buying Breezebrowser. The big advantage of Breezebrowser over Zoombrowser is that it handles LZW compressed TIFF files whilst Zoombrowser doesn't. If you are playing around with raw files, this is likely to become an issue for you.