You know I really can't wait for the resources to come about now.
1) Thanks for the seperation of the size vs layout on the presets
2) The size vs layout is nicely connected. Take Pangaea as an example. You choose the type and click Generate Land and walla you have a nice Pangaea. You then alter the size and the variables alter to the correct number for that preset size.
3) Concern though on the number 2 is as mentioned by Merak Spielman, it looks blobby. (You know that already though) So could some of the mathematical logic in the existing civ4 python scripts help change this.
4) The terrain functions are great! Is it possible to through in an age factor for the land, this could function as a way to group mountains and forest and other things more together? Like the older civ's use to have.
5) The generate misc appears to work but difficult to see. Hope some additional map view options can help eliminate this. You select generate misc and you see a dot here or there appear but its hard to tell all of them that appeared.
6) Icecaps being a seperate option was the right choice. And the ability to increase this number makes for great options in scenario ideas. However increasing the number to say 40 for a more ice land kind of map generates pillars of ice that seams to stretch into the middle of the planet. Could this be changed by making the formula run through a different calculation method. The age of land idea listed above might help in this.
7) Here's a neat one. Generate the misc first and you can then see the red dot's. What do those mean? (I'd still like to be able to see the map views being a different option

) Are they starting locations? I believe they are because
if I turn off the coastal start they don't appear at all. Which needs to be addressed as well. Also I choose 18 and could only count 15. maybe I was wrong or blind though. Anything is possible
8) Which leads me to the Manual. I like

Using an index with links is the proper way to do that. You might think about using pdf995 to create a pdf instead of using a doc. Install pdf995(google it) and then alter your Doc file and print to the pdf995 printer. This will create the PDF. Keep your original to be able to alter it for future manuals.
9) Could you make the exit button write the existing setting to a file and then reload them on start? And if config.ini does not exist have it load the default ones(from the default command button) Which I am starting to appreciate.
10) As for the map view I think an easy way to lay this out would be a check box next to each terrain type. You wouldn't need another tab just maybe extend the window size a bit.
Got to go for now. I know I need to look into the coast line stuff a little closer. I think I was noticing something in Civ4 on the map but not sure until more testing can be done. My weekend though is gone, going out of town.
Overall Good job your really pulling some great things off in the creation of this. Your handle will live on through the ages of Civ.
Tbear2520