Pay commission to 2 different salespeople

We pay commission to agents based on Salesperson settings. However we have one situation, for one customer, where we want to pay commission to 2 different salespeople for the same order. 40% to one agent and 60% to the other. Can anyone think of any creative, simple ways to account for this within MYOB without disturbing to integrity of the other sales figures for these 2 salespeople ? Thanks  Chris