setting default options just for text/plain

[Andreas Fromm]

Helge Blischke wrote:
> Andreas Fromm wrote:
> 
>>Hi,
>>
>>I migrating our printing system for a Linux-work group from lprng to
>>cups, and there is one thing I'm not getting to work. We are filtering
>>plain-text documents send to the printer through a2ps for printing 2-up
>>pages with a pretty header, and that should continue working with the
>>cups-system.
>>
>>My question is now, how can I tell cups that just the text/plain - type
>>should be printed with "-o prettyprint -o number-up=2" by default? I
>>tried some changes in the mime.convs file, but couldn't get it done.
>>
>>By the way, the -o prettyprint isn't doing what it should do. It puts a
>>Grey bar on the top of the page, but it is not writing the filename and
>>page numbers.
>>
>>Is there someone who could give me some hints? I couldn't find something
>>useful by googling.
>>
>>Regards
>>
>>Andreas Fromm
> 
> 
> Look at the lpoptions command. You may specify a printer instance 
> (printername/instancename) on a per user and on a system-wird basis, but
> currently these instances aren't advertized over the net (that will come 
> with CUPS 1.2.x, I think).
> 
> Helge
> 

What is an instance of a printer. Does that refere to just the 
text/plain mime-type?