Thats very interesting, I did not think of. So setup the shoots value to 100 (why zero? and visible when clicking on) and update after each shoot action. The only problem would be storing the remaining shoots between battles, as there are not 100 shoots/battle, but for all battles. But this can be done by decreasing v99 (AMMO value) with every shoot and store it at the end, moving the result to next battle as creature shoots value.
Thanks. I will post my beta script as soon as it will be ready, as for now I am stucked in photoshop graphics (there is so much to do..)