Fight continue with a new invoke battle

I know how to used Zone Doctor to create a new "Invoke battle....", its pretty easy. What not & confuse me is the "bytes left", because even if I manually delete from other Event# for space, it only apply to that #, not the overall. How do I free up space so I can induce the "game over" scripts under every new "Invoke battle". 


Also, how do I carry over the "status, summon used up, & etc" forward to the next battle, like during the Statues of Gods, without the "Change background layer...."?