Nice one HTFC. I was thinking of the same thing. I made myself and some of my friends in PES 1. One of my friends was the goalkeeper and we put ALL his stats to 99, just for fun, not for serious use. We tried it but he SUCKED at goalkeeping. You should have seen his face everytime 'he' made a stupid mistake which lead to a goals against us. Haha, priceless!!
But I meant to point out that putting some or all stats very high, affect other stats which can make a player as lousy as hell, although you would think he would be the best player on the pitch.