One aspect of the game that is not accurate that could easily be revamped is the fact that only one technology can pursued at one time. In real life governments allocate their research funds to multiple research laboratories that not only compete with each other to make the same breakthrough, but also to research different subjects entirely. Although if one were to research multiple technologies at one time, say archery and horseback riding, both technologies would take longer to learn, both would be acquired closer together thereby eliminating the wait for the horsearcher (I have not recently looked at the tech tree so this example might not work, but others would.) With a slider under the research bar the player could gain easy access to this option. I would propose a patch for Civ IV but I am not that computer savvy. If anyone would like to make this patch or mod feel free to as long as I am contacted and it is made available for both Civ IV and Civ IV Warlords.