As/php/xml news system =)

Hello here!
First of all sorry my English is likely to be bad ( i am fra ) , hmmm i would like to make a news system with a box which contains just one news by page ( and so there is not one only page ) , under this box ( container ) i’d like 2 buttons to go next or previous news ( if there is one other of course ) , could somebody explain me the step to be followed or would have aninteresting link for me ? i forgot I would like that the news is contained in a xml file , thanks :te: