On the root of a drive other than the OS drive, just make a new folder called Avid MediaFiles. Inside that make a new folder called MXF. Inside that a folder called 1. Put the MXF files from the HDS into the 1 folder. When you launch the Avid, it will scan the drive and build a database (.mdb) for the folder. Then just drag the .mdb file into a bin as described. It should make master clips that are linked to the MXF files.