How do I add a custom unit?

[Brianc]

I have v2.21 and I would like to start adding all of these customized units. The editors that are available do not work with latest version of civ3. I have changed the pedia stuff and put the files in the correct directory. What do I do now? TIA

 

[TedG]

The Hacked 1.21f Editor works with the newest patch to add units.

Also see this tutorial to learn how to add units properly without the game crashing.