D&D 3.5e Gnome Hooked Hammer macro?

So I just started a new 3.5e campaign last night and I'm playing a gnome Rogue.  I've decided to try out the Gnome hooked hammer as my starting weapon, with two weapon fighting as my starting feat.  My question, as it's a two handed weapon, how do you make a macro that has the 3x multiplier for the main attack (1d6) and a 4x multiplier for the second attack (1d4)?

For simplicity I'd likely make two weapon slots be the weapon, weapon slot 1 as the main attack and weapon slot two as the second attack. You can then alternate as needed. There are much more complex ways of doing it but you'll be opening yourself up to a whole world of macro based hurt ;)