[xwiki-users] Customizing PDF Output

Hello Community, I have a important question: How can i customize my generated PDFs? I know, that I can edit the pdf.vm, pdfheader.vm and so on.. But I need to include two Images in the header and the footer, which should be used as background. Also, I can't set the hight of head and footer. Does anybody know, how I can do that? And I have read, that you can include a CSS in the PDF generation process. How can I Do that? Sorry for my number of questions, but i haven't found any useful infos about this questions.. Greetings, Greg