You have to add the rest yourself. The name of the account. This one is more useful than the traditional PM entry slip because you generally know which account you will post to before you launch the entry slip. Pocket C - Checking account. Checking V - Visa Account.
Withdrawals are negative, Deposits are positive.
The script takes a single argument, delineated by commas. If you set it to 'true', the PM slip will pop up for you to check. Otherwise, it will post without confirmation from you, and make a little noise to let you know it did something. This script is similar to PM Item, but it's set up for transfers. I have a special category called 'transfers'.