HPDJ 1600CM: Change paper size & print quality

I have access to a HP DeskJet 1600CM printer in our local Unix network.
The problem is the following:
The default paper size is "Letter" and the default print qualitiy is "normal".
1.) I want to change the paper size to "A4" (very important)
2.) Print quality could be better than "normal" (no so important, but would be nice..)

Our system administrator is not willing or able to modify the
configuration so that a "normal" user can print out things on DIN A4 paper.
My question:
How can I (as a "normal" user without root privileges) change
the paper size to A4? Which printer command (escape sequence) is used to do this?
How do I submit this command to the printer?

If you know it, please tell me the commands/things I have to
do (unfortunately I don't have any manual for the printer).
Thanks!
steffiAsked:
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emmonsCommented:
The deskjet 1600, according to HP (www.hp.com) uses PCL5.
check out
http://www.wotsit.demon.co.uk/formats/pcl5.zip

There are a bunch of things you can do with a PCL printer. I think that the piece that you want is lj1710.asc, and lj1686.asc. These say how to use the job control language. This is a piece from the first asc file...
PAPER SIZE
     
     The following command permanently changes the default
     menu setting of the LaserJet 4 family to a paper size
     of legal.
     
     Ec%-12345X@PJL DEFAULT PAPER = LEGAL
     Ec%-12345X
     
          NOTE:  Variables are Letter, Legal,
                 Executive, Com10, B5, A4, C5, DL
                 and Monarch

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