[plt-scheme] DrScheme print preferences

DrScheme is installed on the (Debian) Linux workstations in our  
computer labs. Each student logs into his/her own account.

The "Destination" preference defaults to "Preview",
the "Print Command:" text field defaults to "lpr" and
the "Preview Command:" text field defaults to "gv".

DrScheme apparently doesn't inherit the environment of the login shell  
that it launches from, because printouts don't go to the default  
printer set by the student login accounts.

We tried adding the "-Pprinter" option to the print command, and that  
works, but DrScheme only remembers this for the current session. The  
next time DrScheme is launched, the print command reverts to "lpr"  
without the printer flag.

Same story for specifying a different preview command. We wanted to  
change from "gv" to evince, but the change is only remembered until  
quitting DrScheme. Likewise, the Destination radio button to select  
"Printer" or "Preview" appears to reset to "Preview" between DrScheme  
sessions.

I'm sorry if this question has been answered before, but we couldn't  
find a way to save a set of print preferences that is preserved  
between DrScheme sessions. Ideally, we'd like to set up default  
preferences for all users, but it would also be fine if we could have  
each student save their own print preferences.

Any help would be appreciated.

Thanks,
Marc