(newbie) page numbers in header

Hi,

I'm switching from FrameMaker to DocBook4.2 for my technical 
documentation (the reasons why would possibly bore you so I go on with 
my question/problem :). The first thing now is to implement my company's 
CI in the stylesheets which goes quite well except for the following:

I'm desperately looking for a way to put the page numbers in the header 
(as part of our CI).

I've read through "DocBook XSL: The Complete Guide", the "FO Parameter 
Reference" and but without finding something helpful (I might be missing 
the regarding paragraphs, though).

Could somebody please point me to the right direction? An example would 
be most appreciated :) ...

Thanks for reading

Thomas Gier

Technical Writer
Imperia AG
Germany