Magento - individualize PDF Template

Magento generates an invoice in pdf which looks bad and is about 900KB of size. We need someone who can edit the php files so we can print the invoice on our writing paper, which means font type and size need to be changed, tables and layout should be changed and some additional information must be added. The pdf is based on Zend Framework which you must be able to work with. Here you find some information: [login to view URL] You will get all files when we start the work. We provide you all information and can test the edited files on our system. Important: We need to start immediately and finish within a few days!!!!! Note: We need an invoice with contact information, product description, price, date etc!