Split of Cash Discount to more than 1 BU at cash receipt application time

hi

is there a way to split a cash disc to more than one business unit at the time of cash application. As I recall the PKD -discount-aai can only point to one account at a time. The requirement is for tht e discount of say 30.00 to be split between 2 discount accounts based on the discount field in the cash receipt application

thanks