The original patch was released as an xdelta file. Here’s the streamlined method:
: If using an undub or specific file patch, use a utility like Delta Patcher to apply the .xdelta file to your ISO. dynasty warriors 6 empires psp english patch portable
If you’re a completionist or want the full Empires experience in English, your better bet is Dynasty Warriors 8: Empires on PS Vita (official English release). But for fans of the DW6 era specifically, this patched PSP version is your only option. The original patch was released as an xdelta file
: To fit on the PSP, the game features lower resolution models, a reduced troop count on screen, and the removal of swimming and dueling mechanics . How to Apply Patches on Portable the game features lower resolution models