This is how to install the large format printer. Installing other printers is similar in some respects.
System Preferences, Print & Fax.
Click the '+' (add) on the left side.
At the top, select "IP Printer"
Protocol: Line Printer Daemon - LPD
Address: 192.168.1.29
Queue Name: WINPRINT (Case sensitive)
Print Using: Other...
Navigate to 3 Resources : Printers : RW470 : RW-470.ppd
Choose.
Add.
If the settings look like this, click Add.
The new printer should appear as "192.168.1.29". (Some machines have trouble if the printer is named 'WINPRINT on 192.168.1.29'.) This is also the name you will see in Page Setup. It will be the default, unless you want to make another printer the default.
(To make another printer the default, double-click the printer in the list. When it opens, choose 'Make Default' from the 'Printer' menu.)
Page setup (PM, AC9 or 10):
18x24 is ARC C. 24x36 is ARC D. 30x42 is 30X42, not ARC E. If you don't see 30X42, make sure you got the ppd file from the RW470 folder, nowhere else.
(Panther (10.3) setup here.)