Download the .zip file with the link from KVR Audio and extract it to a location of your choice on your hard drive. Installation instructions for the various formats are included in the .zip file. IMPORTANT: Do not move or rename any of the folders or files, doing so can cause missing samples when loading the kits and instruments.
The MPC .zip download is an MPC Expansion Pack installer and is only necessary for MPC users. All other formats are included in the first link.