Hi, welcome
1. You are NOT running version 1.29 of Civ3 Complete, as that does not exist. You are either running version 1.29 of an incredibly ancient release of Civ3 that was produced by MacSoft when God was a boy, or you are running the Aspyr software that was released about six years ago, and is not version 1.29.
2. If you are running the MacSoft version then there is probably only one editor that can help you. It was created by Brad Oliver, but it never made it to version 1.29. You would have to run version 1.21 to be compatible with it. You would also have to be running a *very* old version of Mac OS X. I really don't recommend that you spend time and effort on getting this to operate.
3. If you accept my advice you will ensure that you are running Aspyr's Civ4 Complete. If you get an old DVD, check that it is updated to Rev A using the updater you will find on Aspyr's web site. Then I suggest that you look for
Quintillus' cross-platform Civ3 Conquests (C3C) editor, and take it from there.