Vtiger 5.2 pdf invoice and sales order modification - repost

Hi! I need to fix some pdf created automatically by vtiger ( invoice and sales order ). I already made some customization, now I need to make some minor graphic upgrade and to change a couple of references ( to use a different field to populate a box on the pdf ). As you can see from the attachment there are 4 changes A) Change the field used B) Reduce space between header and table C) More space between services D) Insert number of pages e.g. 1/1 or 1/2 ( nice to have, but if is hard to make, cancel it ) Vtiger version used: 5.2 ( NOT 5.2.1 ) I am re-posting the project because the other project had a too high minimum bid.