Default to A4 paper in OpenOffice with hp deskjet

[Zach]

For some reason, whenever I print in OpenOffice on my HP Deskjet 6127,
it always defaults to A4 paper.  Not being in Europe, I have to set
this manually to Letter each time.  I have checked everywhere I can
think of and even set the default to Letter under the settings for the
printer under System-->Administration-->Printing.

Can anyone tell me how to set this?  Is it an OpenOffice setting?  Is
it an HP Print driver setting?  I haven't tried any other printer,
because this is the only one I have.

This has been a problem for me in 4.10, 5.04, and still in 5.10.

Thanks
Zach C