[Printer for pictures] Compatibility with DPOF / Direct Print

Hi,

I have a Canon PowerShot G2 digital camera. The manual indicates that it
is compatible with DPOF (Digital Print Order Format), to print pictures
on DPOF printers.

I am interrested in the Canon Selphy CP500 (or CP400) printer which
accepts PictBridge or Canon Direct Print digital cameras. The printer
was in demonstration in a shop and the salesman did not succeed to print
a picture directly from my digital camera (PowerShot G2).

My digital camera is not PictBridge which seems to be new, but is it
possible to print with this printer since there is the Direct Print icon
on the first page of my digital camera's manual?

Thanks by advance for your help, I find any information on my manuel or
in the Internet.

Vince