BGG: http://boardgamegeek.com/boardgame/651/zero
Rules: http://freespace.virgin.net/chris.lawson/rk/zero/rules.htm
Players swap one card from their hands with a card from a pool, aiming to score as few points as possible. If a player succeeds in achieving a hand with zero points, the round ends immediately. After several rounds, the player with the fewest points is the winner.
No changes needed!