The Altera Centauri collection has been brought up to date by Darsnan. It comprises every decent scenario he's been able to find anywhere on the web, going back over 20 years.
25 themes/skins/styles are now available to members. Check the select drop-down at the bottom-left of each page.
Call To Power 2 Cradle 3+ mod in progress: https://apolyton.net/forum/other-games/call-to-power-2/ctp2-creation/9437883-making-cradle-3-fully-compatible-with-the-apolyton-edition
Why I think it's not a graphical problem, is that even the name of the civ's is f-ed up, and the units have vanilla names. This would indicate that the file is run seperately from the scenario folder. Have you tried re-installing into another folder, and run it from there?
And this is the correct order, but I bet you've done it like this already:
Multiplayer Game
Network Game
TCP/IP
Load Saved Multiplayer File
(Browse the file from the scenario folder)
Ok
Ok
Start Game
Ok
Chose your civ
Comment