This contains the Adidas Roteiro Euro 2004 Ball.
Copy the files to FIFA13/Game/Data/Sceneassets/Ball folder.
Use Revolution Mod by Scouser09 and add correct line to ball.lua.
Open CM13 and clone the Hummel 0.8 Concept ball.
Extract the files to any folder.
Then click on Import RX3 Textures in CM13 and search for the ball_xx_textures.rx3 that you have extracted.
Give the ball a name (Adidas Roteiro Euro 2004) and click on visible in menu. Save DB and start game.
PS: If the ball is not visible ingame after adding it to the DB using CM13, use DB Master and open the DB.
Search for the "Teamballs" table and open it. Search for your ball ID (For example: 32). Make sure that the PowID of your ball is set to -1.
Save and play the game, it should be added to the DB!
You could also just rename the files to ID#1 and regenerate, it will replace an EA ball.