Using object extensions and default functions

Ok basically I'm trying to learn how inhearatince works in Bmax.

I have an object that is the base for all my enemy types.

This enemy object has some basic code in it's methods that all the extension objects use. I would like to do something like the following.

type enemy
method update()
(command set)
end method
endtype

this is what I would like to do with an extension object

type red_enemy extends enemy
method update()
(parent command set)
 individual commands
endmethod
endtype

I would like the extension objects to have the parent command data PLUS some small original code added inside those.