Today in the Ideas and Suggestions forums i put an idea of how to improve the resource trading system, but after posting i realize that firaxis would never read the thread (I think they have never read that forum), so i put a link here, maybe someone that knows the programing language of Civ IV could make a mod for it or something (From what i know this mod could be done, because in Civ IV its supposed that nothing is hardcoded, or so i read)
Here is the Link:http://forums.civfanatics.com/showthread.php?t=148095

PD: Sorry for my language it´s not my language.