Default printer in Vista picture preview

[HewittC4]

My father's computer has Vista and an HP Officejet 6200 printer/fax/scanner. He prints a lot of picture on it from the picture preview applet, but the default printer is set to the fax in that app. The computer's default printer is set to the printer. He has to change from the fax to the printer every time he prints pictures and he isn't computer literate enough to understand that.

I've looked and looked, but I can't find any way to change the default printer in that applet. Does anyone know how?

Thanks.