I just recently started making a modification, and this is my first mod. Basis for mod was the source code RA3 Upheaval created by Bibber. This mod brings a significant change in the balance, and adds some new units. I'm very bad speak English and you can do something does not understand, I hope this does not happen. Important note: for the mod to work correctly, you must run "model detail" at least at high for the mod to work,it worked even if you put other options at low. However, I would recommend play with maximum graphics settings.
Source code of version 1.3 Perhaps someone will find something interesting for themselves in this. You can use the code or parts of it at your discretion. I will be glad if this helps someone in creating a mod or learning how to mod.