Also if I am correct..the file size for trammel/felucca is wrong you can find the correct size in MapDefinitions.cs in Scripts\Misc
RegisterMap( 0, 0, 0, 7168, 4096, 4, "Felucca", MapRules.FeluccaRules );
RegisterMap( 1, 1, 1, 7168, 4096, 0, "Trammel", MapRules.TrammelRules );
RegisterMap( 2, 2, 2, 2304, 1600, 1, "Ilshenar", MapRules.TrammelRules );
RegisterMap( 3, 3, 3, 2560, 2048, 1, "Malas", MapRules.TrammelRules );
RegisterMap( 4, 4, 4, 1448, 1448, 1, "Tokuno", MapRules.TrammelRules );
RegisterMap( 5, 5, 5, 1280, 4096, 1, "TerMur", MapRules.TrammelRules );
The numbers highlighted are the ones you want to look for so the map size for trammel is auctually 7168x4096 not 6144x4096
Also, as far as I know there is currently no map editor that can edit maps 2, 3, 4, 5 ilshenear, malas, tokuno, termur etc, so you will have to make custom maps (which is told how to in MapDefinitions.cs, if you need more help please do PM me and I might be able to help more.