yes, you have to select send page to or send link to first..it's either ietab or trident render.. i don't remember.
make sure to extract all files to their proper folders and it's very important to delete those 2 files from k-meleon\components folder:
compreg.dat
xpti.dat
those will be recreated and register the ietab components... if you still have problems, then download ietab exe from alain's page
http://pagesperso-orange.fr/jujuland46/JujuLand/KMES/K-Ext110_IEtab.exe
which will automate deleting those 2 files but use the macro from km-ietab1.6.7z