Where are print drivers in Zorin?
 

Linux newbie - just installed Zorin to try to cover some things that only Win XP would do for me.
One issue is with a HP k850 printer. These printers have a date in the ink cartridges so when they are 1 year old the printer won't work, even though there is plenty of ink.
I found a work-around to modify the XP print driver to turn this "feature" off and it works fine. It seems the Win7 drivers are integrated into the system and inaccessible.
I installed the HPLIP (HP Linux) driver in my new Zorin installation and it seems to connect to the printer fine, but still says old ink - won't print.
I think that if I could find the HP print driver in the system files, I could make a similar modification.
1) How do I find the print drivers?
2) Is there anything special about the file format that will require special software to edit? For the XP fix I needed to use a hex editor.
Thanks for any guidance a more experienced user may have to offer.

Update 20 May 2014
Thanks jdkaye. I find these files in the Zorin file system also so I'll search through them and see if I can find the entry I need. I'll also try to mark this thread solved, if I can figure out how to do that.

I found them by looking at the hplip on the Debian website. Whether this will help you with Zorin, I can't say. But for what it's worth here's where they are:
Maybe the very first file on the list is the one you want. Or maybe it's /usr/bin/hp-setup. You would know better than me.

jdk