Taking a page from OD&D, I've ruled that spears/lances do 2d6 (keep higher) when charging, 2d6 (keep both) when set against a charge.

Here go some H&I modifiers

Advantages position +1 melee or +1 defense
Charge +1 to hit & -1 defense until next turn
     Spear, lance, polearm  in or against charge +1d3 damage
Unarmed -1 defense vs armed opponent who gets +1 defense
No sea legs -1 defense and all actions at sea if hero does not have pirate/sailor career
Blind have penalty die to all physical/attack rolls and range has an additional -4 (ranged beyond close are impossible)

My groups used to them so we apply them to other BOL games out of habit.

I use the following for chases; sides roll 1d6+mind, the winner gets to set the scene within reason as they are quick witted enough to exploit their environment. If able to use the environment for something cool I provide a bonus die. Heros then roll 2d6 plus Agility (Strength may be more relevant, your call) against a difficulty mod equal to the pursuers Agility. An example would be a hero on foot fleeing mounted guards through the city, the hero wins the initiative and declares a tight alley to small for horses that he can slip away through. Career ranks may come into play such as when a tumbler gets creative. I then have just the one roll. Multiple rolls, in my opinion, only increase a heros chance at failure.

Yesterday I saw that spear has both kroarked (mounted) dmg and dmg against charge at value d3.

I haven't finished reading H+I, but those rules sound like nice additions to the BoX Engine