PO charge account for Inventory Expense Items

Hi Everyone,

When we create a PO for inventory expense item the charge account is defaulted from the IO i.e. inventory expense account, what my requirement is that as it is a expense nature account the user should be able to change this account while entering PO.

Where as this is not the standard functionality is it possible to do so by customizing the POWFPOAG workflow, i have tried doing so but didnt found any solution else can we do this by from personalization.

Thanks in advance

Regards,

Israr