Displaying DivX File Duration in Windows Explorer

Hi All, I have a large collection of DivX files which when displayed in
Explorer do not show any details in the "Duration" column. Similarly, no
thumbnails seem to be available for DIvX files. Is there a fix for this
problem? Similarly it seems to be the same for FLV files - all others
display perfectly well i.e. mpg, avi, wmv.
Thanks for any help.
Jock