How do I install printer drivers

I work for a local University and am charged with writing a script that will install LPR printers to Mac laptops so that even the less knowledgeable users can install the printers and then print off our printers. I have been researching this for a couple od days to try to make it correct the first time as I like to at aleast know what I am doing. I am a windows guy, however I would love to get into scripting of all kinds on ALL platforms.

I have successfully installed a printer to a Mac through command line. This is what I have for that:

lpadmin -p BLD-111-BW -v lpd://at-server.ad.college.edu/bldg-111-bw
/usr/bin/enable BLD-111-BW
accept BLD-111-BW

The above codes adds the printer, enables it and allows it to accept jobs, however I still get errors where it comes to printing. I think it has something to do with the drivers. I have the drivers downloaded for the “HP LaserJet 4250 PS” printer and I can pull the files out of the MPKG with the use of my windows PC. What is the command to install the drivers, where do I install them and what exactly is the file I am installing?

Thanks in advance for any help offered!!