Screen shots are going to be hard.
Tell CS3 to print, you get the CS3 print dialog box (PS manages color, rendering intent etc..).
Select Print.
Apple print dialog comes up where you can select the preset, color management for the printer, paper type etc...
I have some presets set up for Red River Polar Satin and some others. When I select one of these, on occasion, all the presets are changed - paper changed from Premium Luster Photo Paper to Plain Paper. under color management, Color management was Off and is now turned on so the printer manages the color.
That was the first problem.
The second problems is that it will often on a given image try and print with a 1/8" border on the leading edge of the paper and then on the right edge of the paper (as you face the R1800).
Quitting CS3 and restarting CS3 usually fixes both of these issues.
J