sorry to be the bearer of bad news, but: the lexmark Z series are totally useless in linux. they rely heavily on windows drivers to control them. this is good for the windows user because the drivers handle a lot of the printers functions (like Linus Torvalds new CPU that uses software to run stuff) and lower the price of the printer but, they don't have any drivers that work w/ debian and they won't release info on the drivers b/c then other companies could imitate them and make cheap printers like theirs. lexmark optras are fine, but by all accounts, i'd go with an epson or hp printer as i hear they are the best for linux compatibility. Now, if you're bound and determined to make your Z series work, lexmark has released some linux drivers, but they only work with certain versions of redhat and mandrake. I'd just get a new printer though, my Z series broke after 6 months of not-too-intensive windows use anyway.
check out linuxprinting.org for more info i'd also recommend cups.org and linuxnewbie.org for more specific instructions
