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
Is there any way to use a custom map with modified victory conditions? It seems that if you load the custom map into WorldBuilder you are forced to use default victory conditions, and if you start with a "custom game" you can change the victory conditions but there is no option to load a cutom map.