How to get this version working properly (and not slipping on a banana in the process)
1 - Have DoWPro: Soulstorm 3.59 PREVIOUSLY INSTALLED. For those who have 3.61, 3.62 or 3.63 it is heavilly recommended to uninstall and then reinstall 3.59 in order to avoid possible issues.
2 - Download DoWPro: Soulstorm 3.64 and grab the .rar file and drag it to your main Soulstorm folder which is located in Program Files/Dawn of War Soulstorm (For Steam users it should be: Steam/SteamApps/common/Dawn of War Soulstorm).
3 - Use winrar or 7zip and unpack the contents of the DoWPro 3.64 .rar file in said Soulstorm folder.
4 - When asked to overwrite say "Yes to All".
5 - Congratulations. Now you have 3.64 installed and ready to play. Now eat that banana. You deserve it.