Once you got the 12 files downloaded and unpacked(unpack the very first one and it'll unpack them all). Open the Imperial Destroyer folder, and merge it's data folder with the Empire Total War one
Once thats done, move the early script file found in scripts to the Creative Assembley/Empire/Scripting folder, replace if need be
Also, you should have the 4.5 patch, its 6 parts, and has the English translation.
Basically, just open the folders and merge the folders that have the same name
Should work! Hope you love the mod, its awesome!