Hi, I want to start modding my game to get the best out of it. The first thing I want to do is with the zulu. I want to change the impi to a swordsman replacement rather than a spearman one, and change it's stats to 3.2.2, befitting the impi. Can someone tell me how to go about this please?

In the editor with a BIC with custom rules just change the prerequisite tech to the one the the swordsman has, make sure to add it to the upgrade chain by changing what it upgrades to and and what upgrades to it (you may want to write it out to figure out what path is best), then change the stats to whatever you want

thanks for replying. Can you tell me exactly what program i need, and any crucial steps in doing so (and how to do them). This will be the first of a few things i will mod, so any input is much appreciated.

Civ3Edit is all you need but Civ3MiltiTool could help.
Open or make a new BIC turn on custom rules in the scenario menu, then click edit rules and go to the units tab.
Change the prerequisite tech, the stats, and anything else you want.
Check what upgrades to what and write it down, find a good place to put it in and change the "upgrades to" to fit.
When you upgrade it goes to the most advanced unit you can build skipping any that it can't, so some UUs upgrade to other Civ's UUs that replace the same unit

Thanks a lot. I just needed to be shown once :D. Now time for the new. improved impi!