installing MFD canon IR 5840 and 4080 printers using only one queue

So we have a print management system, and Canon Multi Function devices installed everywhere. When we send a print, it goes to only one queue, and will print on whatever MFD you log on to. TRouble is there are multiple models, i.e.

Canon IR C4080
Canon iR C4580
Canon 5840

When we send a print to the 4080 using the 4080 PCL drivers from a Mac, it prints fine. If we send them to the 5840 it prints gobble-de-goop.

So now I'm testing the 5840 drivers on both to see what happens. I'm not sure which to try, the PS drivers or the UFR II (whatever that means) drivers.

Trying the Mac CUPS UFRII/UFRII LT Printer Driver (v10.2.1)  driver:
4080 - blank A3 page

Canon PS Printer Driver for MacOSX v4.00 (v4.00)  driver:
4080 - blank A3 page

Installing Canon Multi Function Devices iR C4080/C4580 on OS X 10.6.6

We've got a print server set up which controls the print queues for the new(ish) Canon MFD devices around college with the potential for charging. I think it uses some Canon type software to keep a track of it all. So, on speaking to the guy managing all this he has tried and tested it. Pretty simple really, not sure why I'm writing this down. I guess just in case I have acute amnesia.

So:

1. Install the PPD's from the downloaded PKG file (not sure where it's from but I did find something similar here on the Canon Website under PPD drivers. Same name and size.) called - CanonPPD300.pkg.
2. Load up System Preferences and go to Print & Fax
3. Add printer (the little plus sign in the bottom left)
4. Setup an IP printer
1. Line Printer Daemon - LPD
2. put the DNS address of the server (no "LPD://" at the beginning)
3. put in the queue name - CanonCOLOUR - for our printer
4. whatever name you want
5. whereever
6. Click "select printer software"
1. do a quick search for "4080" and click on "Canon iR C4080/C4580"

Done. Tested and works a treat. 

To print black and white, in the File > Print dialogue box:

Click:

1. Printer Features option in the main drop-down just below "Orientation options"
2. Change Feature Sets to "Color 1"
3. Change Color Mode to "Black and White"

Done.