A map is another way of saying tune I guess. So you can have up to 5 tunes available to load at any moment. You can have an E30 map, a 93 stage 1 map, a stock map, a 93 map with crackles and pops, 93 stage 3 map and switch between them whenever you want and have up to 5 tunes available. I don't have an Accessport yet so I don't know how to actually switch maps, but I'm sure you can find the manual online somewhere.
You're not running the E30 tune on 93 pump gas right?