How To: Pass parameters to XSL with CQWP

I build a customized CQWP to add paging (without using connectable webparts) and some filter options. I needed some information in the XSL about the amount of pages, current pagenumber, ... to build up the paging. That kind of information was available in my CQWP class but I had no idea how to access them from within my XSL. After some google research I found an excellent article of Waldek Mastykarz that helped me a lot.