Hi Lordfox, there is a listing of all the command names for putting into a shortcut key here:
http://moi3d.com/3.0/docs/moi_command_reference11.htm#shortcutkeys

The particular one you want for that command is InterpCurve which is short for "Interpolated curve". It would have probably been better to have named the command CurveThroughPoints but oh well... The labels in the UI went through some changes after the command had already been created.

Hope this helps!

- Michael