Here's what my MAPINFO looks like:
map MAP01 "The Sewers"
levelnum 1
next MAP02
sky1 "RSKY1"
music "D_RUNNIN"
cluster 9
clusterdef 9
music "D_READ_M"
flat COMP03_1
exittext ' After finding out about the
dissapearence of your brothers
you decide to go and
look for them.
But as you enter New York,
You find the sky to be an
unexpected blood-red.
Something was going down in
New York City.
map MAP02 "New York Bloodlust"
levelnum 2
next MAP03
sky1 "RSKY3"
music "D_STALKS"
cluster 1