Expenditure Inquiry on Manually Entered Expenditure batches

 Has anyone else ever wanted to inquire just on manually entered expenditure batch activity for a project?  If so, how have you gotten the ability to do that?  What I have learned is that when you enter a manual expenditure batch, the transaction source for that expenditure group defaults to a NULL (blank) value.  You are NOT allowed to enter a value for the Transaction Source field in entry (it is there, but protected).  I am guessing the design intent was that if you see a NULL (blank) transaction source, that means the source was manual entry.  Which makes sense.