Hi Rich, for toggling the grid on/off see here: http://moi3d.com/forum/index.php?webtag=MOI&msg=4954.2

For #2, there is a listing of all the command names here: http://moi3d.com/2.0/docs/moi_command_reference11.htm#shortcutkeys , the one you want for the "through points" one is InterpCurve - that's short for "Interpolated curve".

Hope this helps!

- Michael