I'm also new in map making but i compiled my map several times with mapgen2.....it took 24 minutes on AthlonXP 2500 512 RAM....with working photoshop,icq,winamp in the same time....
Talking about swatches....you can enter the folder with your mapgenerator (i.e)D:\MapGenerator II\data .....then open terrain.xml........there you'll see different names of tiles and the color for them in the same line like:
Code:
<Terrain Name="Deep Water" ImgIndex="0" Hash="0x00" Tile="168" Red="0" Green="0" Blue="130" BaseAltIndex="16" />
so the RGB will bee 0 0 130