The DLC will introduce a dedicated ‘Copa Santander Libertadores 2012’ game mode, with all the 38 teams, rosters and the official ball for the 2012 competition brought fully up to date.

Instruction :
Copy to ProgramData /Konami /Pro Evolution Soccer 2012 /download

In order Copa Libertadores 2012 is available you need this DLC and then update PES 2012 to version 1.06