Apparently, the index.html file is missing in Cygwin GRASS 6.2.2-1 (18-Jul-2007) I dowloaded from http://grass.ibiblio.org/grass62/binary/mswindows/. Also other sub-indexes like display.html, raster.html seem to be missing -- these pages are there in the online HTML 6.2.2 manual. Is there a particular reason for that?
Regards,
Luigi