Converting Playchoice 10 Tecmo Bowl to Baseball stars?

I was looking over at http://playchoice.riemen.net/ how you can do the conversion hacks between boards of similar type, by soldering/cutting connection on the SL and CL pads, and adding/removing diodes.

But I cannot make heads or tails of the spreadsheet: http://playchoice.riemen.net/downloa...pc10_hacks.pdf

Anyone know if you can hack a Tecmo bowl to play Baseball stars game, and the procedure?

Thanks!