There is no reason to change facets, all you need to do is change the season.
Open:
\Scripts\Misc\MapDefinitions.cs
Code:
RegisterMap( 0, 0, 0, 6144, 4096, 4, "Felucca", MapRules.FeluccaRules );
RegisterMap( 1, 1, 0, 6144, 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 );
Change to:
Code:
RegisterMap( 0, 0, 0, 6144, 4096, 0, "Felucca", MapRules.FeluccaRules );
RegisterMap( 1, 1, 0, 6144, 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 );
Notice the small change in the felucca line, from 4 to 0. that controls the seasons.
RegisterMap( <index>, <mapID>, <fileIndex>, <width>, <height>, <season>, <name>, <rules> );