Right-click only on Part 1 and select "Extract Here." The software (WinRAR or 7-Zip) will automatically reach into Part 2 and beyond to pull the full files out. 2. Identifying the "Custom" Factor
If you’ve found yourself with a multi-part archive like this, 1. The "Golden Rule" of Multi-Part RARs Rocksmith.Inclu.ALL.DLC.part2.rar
Once extracted, you’ll likely see hundreds of .psarc files. Right-click only on Part 1 and select "Extract Here
You must have all parts ( part1 , part2 , part3 , etc.) in the same folder. Rocksmith.Inclu.ALL.DLC.part2.rar
Most "All DLC" packs found online are created by the community. To make these work, your Rocksmith 2014 Remastered installation needs a "door" left open: