Dacu

I own Rage Against The Maching - Killing In The Name Of and Deftones - Be Quiet And Drive, but they do not appear in the pack/unpack tab of RocksmithToolkit. Right now I cannot buy anymore DLCs, so my question is if it is possible to manually change the package id on CDLCs to match or if I could add the package id to the toolkit list for the 2 DLCs I do own?