RAW Codecs for Explorer
 

For anyone who is interested in being able to see thumbnails of their K5 (and other) PEF files in windows, the RAW codec is [URL="http://www.pentax.jp/english/support/digital/rawcodec_win.html"]HERE[/URL] for Windows 32 bit. others are available from [URL="http://www.pentax.jp/english/support/download_digital.html"]HERE[/URL] - scroll down to 'Software' and look for 'RAW Codec' in the description field.