I realy wish there was a sticky thread with unit instalation trouble shooting information in it. All the units I have seen use the same instalation procedure, and the problems are always the same;
How do I add units?
Why won't my new unit work?
The game grashes when I install new units?
all I get is some useless "attachment" file? (lucky that only happens at Apolyton)
Always the same questions! The problem is that for CIVIII the instalation procedure is so complicated! With civ II all you needed was a units bitmap with the new unit, and a scenario and the unit was up and running.
When I first bought Civ III and tried to add new units I was stumped! I didn't know what to do. But for experienced (1 Month or more

) designers, these questions just take up time and space that could be better directed towards design time.
For the record, you have to name the new unit exactly the same as the INI file and hold it in a folder with the same name. This includes spaces. Check the INI file to make sure that all the lines are correct, that is do all the Flc files and Wav files quoted in the INI text match those in the folder? Is the default animation present? If Civ III can find the Default animation, and the folder and INI and unit are all called the same, the unit should work, even if missing or badly named animations or sounds do not appear.
You can add units using the hacked editor available on this site. Please make sure you use the right hacked editor for your patch number.
Have a nice day!