II wanted to know that if I buy the 360, is there instructions how to install it into the MPC 3 software
360 doesn't include the MPC expansions according to the content list, it's targeted more towards DAW users. Do you mean MPC3 running on AKAI hardware or the beta PC version?
You can find a complete content list here - https://support.native-instruments.com/hc/en-us/articles/18398574650397-Which-Products-Are-Included-with-NI-360-Essentials-Plus-Pro
