I have a Dell All-In-one combo that was most likely made by Lexmark.
There is absolutely
NO drivers to be found for these. NONE!
Best bet is to get an HP printer(or, in my case..use the printer on my
wife's laptop--with Vista.)
Sucks the bag.
Now I will DEFINITELY never go back to Windows. I absolutely HATE
proprietary crap.

Have you installed Gimp-print and/ or Gutenprint. They include many drivers to
work with CUPS and Foomatic?