OSCOMMERCE- Modification of Batch print center Contribution

Oscommerce Batch print center Contribution installed and tested. Now we need help with adding content that do not yet excist in the included templates. We need a modified template which puts mandated legal information in the invoice footer such as bank info, seat of jurisdiction, and automatic calculated shipping date and seller's VAT number in the body of the invoice and a reference number from our back office. Batch print center invoices should look identical with the invoice we send our customers today. (we will send you copy of this and all the needed info)