1.3

extract the files in Portal 2

1.2

extract the files in Portal 2

1.1

1. rename update directory to portal2_dlc3
2. create folder portal2_dlc4 (move all your existing vpks here)
3. extract the files in portal2_dlc4

1.0

1. rename update directory to portal2_dlc3
2. create folder portal2_dlc4 (move all your existing vpks here)
3. extract the files in portal2_dlc4