[AlexH]

Make a text file like so

"level1.nw","level2.nw"
"level3.nw","level4.nw"
"level5.nw","level6.nw"

Use your level names though.

Save that in your graal maps folder.

Open up a level thats on the map and put an NPC with this script

if (playerenters) {
setmap map.png.yourmap.txt,playerx,playery
}

Then press M while still in the editor.
Click Ok then it should run through all the levels in the map text file.
A window pops up asking you to save it.
Save it in your graal maps folder.

In the script now change the map.png to whatever your map name is.

Voila, your done.