Lag cheat 2

You really want to make the game unplayable for your opponent?
The same rules as lagcheat 1 apply for this lagcheat, so you must be hosting the half.

Use some bandwith limiter program like netlimiter/netpeeker to limit the upload speed of pes6.
You need to experiment with the upload speed, but I find 1000 bytes/s a nice setting in netlimiter.
When you activate this bandwith limit the game will halt for your opponent and you can score easily a goal. Don't leave this limit activated too long because pes6 will disconnect from the game/server if too many packets/bytes are dropped.
I usually limit for 30 seconds or so to score a goal and then disable the limiter.