That's summarized perfectly, thanks!On OFW 4.70, you can copy ANY game through the BACKUP, but without a second cfw console. Because, only since 4.75 - Sony has made changes to the firmware and forbade the copying of EDAT files from BACKUPs.
Also @ouso1999 here's a guide for 4.70 & Below, and also a link to the PSDev Wiki Compatibility List for reference.