I have posted a few pictures of our first session of adapting Kampfgruppe Normandy to play in 6mm (with my H&R/Skytrex Spearhead armies). We used the Hill 192 scenario which sees US Infantry supported by armour attacking to capture a hill held by a small force of German Fallschirmjager.
All the pictures are here:
http://wargamestenerife.blogspot.com.es/2012/09/normandy-1944-hill-192-scenario.htmlBut to give some idea:
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Rule amendments were very simple (about using multi based figures and rosters rather than the designed single based 20mm figures) and the game was played using 66% rules.