SR-71
Terminator T850 model 101
The spread of resources is determined by the CIV4BonusInfos file. I have ammended mine and this adds a much more even spread of resources, though some are still restricted to one continent. Crab, Marble, Stone, Whale and Incense seemed very rare in most games, they are more common using the attached file, unpack it here - Sid Meier's Civilization 4\Beyond the Sword\Mods\Realism\Assets\XML\Terrain. It should replace the existing file and you should notice a more even and realistic spread of resources.
Only banana, corn, rice, sheep, lemon, cotton, wheat, tobacco, ivory, silk, spices, sugar, coffee, potato and hemp are restricted to one continent, pretty much in line with what I could find on the natural and historical distribution of the in-game resources.
A question before playing with your xml: the resources are restricted
a) only at start, but they can spread afterwards (by farms and so) or
b) they are completely restricted and won't ever spread out of its continent
I say it because if is a) I'm very interested, because it's the most realistic and interesting, but if is b) I prefer should be a) I don't know really yet if this feature is limited/controlled by this file so I ask.
Thx again for your contribution