How to separate one payment into two accounts?

I'm a new user of Accounted. I installed Snow Leopard on my iMac last night and discovered my Quickbooks Pro 2007 was all scrambled up. So I'm learning to use Accounted tonight, and I really like it! So far I've only set up my bank account, and I've been working in my bank account check register, as in QB Pro.

Here is my question: When I have paid a check to one payee for two different accounts, how do I enter that in Accounted? For example, I paid via check to the Post Office for $15. Seven dollars was an expense in my Household account, and the remaining $8 was a business expense. 

Thanks in advance for any help!