Here is the source code for RA3, as of Patch 1.04 - The last patch. You're welcome to use parts of the RA3: Undecided source in your mod, just add credits...
RA3 Undecided is a C&C Red Alert 3 Mod in which that New Units are added, Balance Changes are Made, and much more. RA3 Undecided was Created to make changes to allow the game to be balanced and enjoyable with new Units and ideas. Some of the Changes consist of Allied Naval Improvement, Soviet Air-force Improvement, and Japanese Defense Improvement, Including Much, much, more...
I've felt like modding the last couple days and have been playing the mod a bit. I'm currently working on balancing the Factions' Navies. I will be releasing Version 1.04 (Eventually).
Changes will include Allied Navy Nerfs and Changes.
Changes to Soviet Navy Unknown at this point. Though the Bullfrog will be getting an Armor buff.
Changes to Japan Navy may include Locomotor Changes to Seawing for better response times and Range increase for the shogun battleship so that it is up to par with the dreadnought and Aircraft Carrier.
Any Suggestions are more than welcome. No need to restrict them to just the navies either. I am merely focusing on the navies this patch because I saw them as an unbalanced mess (mostly caused by our previous changes haha)