Base code set for the Codex Mod. Required for 3.6 and all subsequent versions. Download Codex Base Parts 1, 2, and 3 and extract to your Soulstorm directory. There will be nothing obvious to see from the Base set, they are required for 3.6 onwards. Download all 3, then extract together. Highlight all 3, right click and extract to your Soulstorm directory.
For those at all unsure on how to install........
There's a handy little guide, here:
Apparently this message needs to be at least 200 characters long, so this rabble is to keep the ModDB admins happy..............
Anyway, see the link above to tutorial!