IE Printer settings not saved

I have a custom form size entered in the print media types for one of
my
printers (Eltron 2442 label printer).  I need to use this media
size repeatedly when printing  from a website in IE 6.  The problem is
that
the media size defaults back to "Letter" each time I open IE or go to
another
website.  The custom form size is 8.50in. by 24in.  so letter size
will waste
the form if selected.

I am using Win XP Pro and went to the printers and faxes folder to
make the
change in the preferences for that printer.  After restarting IE the
change remains as it should in the printers and faxes folder but when
you
open IE and select File/Print (select the appropriate printer) the
media size
is right back at "Letter".

Is there a place in IE or the registry to force this to change
permanently?
Or some other way I should approach this?