I know Jason's solution will bring in the balances accross BUT as these balances do not have a transaction attached to them you will end up with DEBIT and CREDITS that will forever age and never go away. PLEASE do not use the adjustment method [we have paid dearly in the past by doing this].
Instead create a non-inventory item and post either a debit or a credit amount to create a transaction. This way when you go to A/R later to make payment etc... yo uwill have a line item to apply the credit or debit against.
Afshin Alikhani - [ snipped-for-privacy@retailrealm.co.uk] CEO Retail Realm