Ol'Flagmaker is a simply PS file but the file contains several useful layers (dirt, fabric, mold, bullet-. and burn holes burned etc.).
You can "easy and fast" make some old looking flags if you're familiar with PS, GIMP or similiar graphic program.
If you have questions and/or suggestions post here i will make a FAQ.
flag.7z is packed with 7zip and large.7z is the brit flag (Backup your vanilla - the folder is *steamapps\common\empire total war demo\data\UI\flags\britain\)
Pic1 (large.tga (brit) and ingame) Pic2 (more ingame)
Regards A.U.