Just to quick jump in, to say thanks for your help.
Since the steam sale is going a lot of people will download this mod this days.)
Thanks, you're quite welcome and I'm glad to help.
On a side note, every once in while I would have a random crash and finally tracked it down. It was actually do to some lines in the vanilla TechPopup.lua. I'm working on a replacement and hope to post soon.
How do I install the fixes? do I drag them into the rebuild file because it says winrar can only add files to zip or rar files, changing the extension doesn't work

Maybe you can talk to Gilga about it? Also I made a mistake, Athena covers Vassalage. Also, I found a txt error, there is an archer upgrade that seems to be called something like (maybe not exactly) TXT_KEY_CITY_DEFENSE or something like thatWhich fixes for you mean? the fixes for the original file replace the files in the community call to power mod folder. If you can't extract them there, just open rar and drag them. The rebuild should be extracted/drug to mod folder. If you mean the rebuild fixes, you shouldn't need if you downloaded recently as they are already applied.
As far as tech tree, I haven't done anything w/ placement in tree as i wasn't sure if Gilga had then placed for a specific reason for future update.
Hope i answered something
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Any plans on a Mac version? As sometimes I can only play on my Mac, pfft, brothers

I know how to install mac mods for Steam, but when I start up a world with this mod it crashes the gameI have no idea about a Mac version, perhaps Gilga could better answer that.
I do know there is a somewhat involved process to get mods to work on Mac, and it only appears to work for the Steam version and not the appstore civ complete. Don't know if you've already tried it, but there's a thread with instructions here:
http://forums.civfanatics.com/showthread.php?t=477763
Sorry I couldn't help more.