[rdonj]

Yes.

#selectmonster nameornumber
#gcost xxx
#end

or

#selectmonster nameornumber
#att xxx
#end

or

#selectmonster nameornumber
#gcost xxx
#att xxx
#end

Those are all the commands you need to do that much, though there's a little more that you have to do to make a complete working mod. The manual says what that is under Mod Info on the first page.

Edit: too slow!