What I have done is created two companies, the default one has a title that says consulting (time billing)and the other company has expenses (expense billing) as a title. The only reason I do it that way is to differentiate between the invoices. I also use different invoice numbers 12???? for time and 99???? for expenses, so there is no confusion on what the invoice is for.
That is the simple part. The auto generating parts are what can't be changed, like Generating the invoice emails to put “consulting invoice attached” or “expenses invoice attached” in the subject line, depending on invoice type.
Again thanks for a great app, saves a ton of time.