hm, well...
to add new maps, open your ROM with A-Map.
then click the 'Insert Map' button. there should be a pop-up menu to appear.
choose 'Create new space' and on the bank, choose 'new bank' and put in how many maps you will insert on that map on the 'Number of reserved new maps'... :\
to add new warps, and events, go to the events tab and on the lower-right of the screen, you can see ''Amount of Events'...
there, you can add/subtract events. ;)