If you own all three games, you can mod them so that you can play against Yugi, Kaiba, and Joey all within the Joey the Passion interface (which has the best AI).
: Most progress is stored in the "Yu-Gi-Oh! Power of Chaos Common" folder.
: Copy *.ydc files for your custom decks and system.dat for overall game progress.
Since most PoC mods are pre-packaged, the installation is straightforward:
