I've edited this map a little bit, I hope you don't mind! I'll upload it ehre for those that want it.
The things I've changed are as follows...
1) All civilizations start with a warrior, instead of some with scouts, and some with warriors.
2) All cities begin with 2 culture, instead of big discrepancies such as some with 0, some with 2, some with 4, and some with 8.
3) Edited some mountain ranges. For instance, now can access Tibet through China and India. Inca can now eventually get around their mountain range, as well as Aztec and Inca can now travel between South and Central America.
4) Able to travel by sea through a narrow passage above North America.
5) Changed America's leader from Roosevelt to Washington.
6) The eastern coast of Greenland now has a very small coastal area for settlement.
7) Done a few minor terrain changes, such as adding trees in specific places, and seperating Nova Scotia in Canada from Quebec, and Newfoundland from Labrador. It's now easier to access western Canada through the Rockies. You can now get through the Caucasus mountains from Russia.
And that's it.
I've attached the file below. Download instructions are...
1) Right-click and select save as...
2) Save it in your My Documents/My Games/Civilization 4/PublicMaps folder
3) Start the game, and choose Single Player, then Play Scenario, and choose the new "Edited by GP" map
http://www.disgruntled-dutch.com/~civfanatics/GreekPlunder/Earth-18EditedbyGP.Civ4WorldBuilderSave