Page Numbering

Hi,

I have to make PDF from an XML like this:
<List>
<Group1>
<Item1>X</Item1>
<Item2>Y</Item2>
...
</Group1>
<Group2>
<Item1>X</Item1>
<Item2>Y</Item2>
...
<Group2>
...
</List>

My problem is that I should restart the page numbering at each <Group>. How
can I do that???

I hope anyone can tell me the solution!

Thanks!
Almos