He probably means map creator, Plastik.
If you want to make maps by paint, it's easier that way, set your paint size 384 pixels x 384 pixels and off you go, design your map
If you want some help, here is a good web to help:
http://www.virtualrailroader.com/LoMoScenarioMap.html
Otherwise, if you don't have Loco Map Creator software, download it from:
http://www.tt-forums.net/viewtopic.php?f=39&t=10713
When you make map, and Red 0 Green 0 Yellow 0 (Full black) means water. Red 12 Green 12 Yellow 12 is land level 3 and when you open Map Gen and set 130 then off you go. Play
