Here's what I want to do:

I have my letterhead in a Word document with lots of small, different fonts.

On the road, I want to use a Treo 600 and external keyboard, with Wordsmith or Quickoffice, to open my letterhead file, type a letter, and print it on an Ir printer in letter quality format.

I've seen programs that claim to do this (i.e. Wordmsith, Quickoffice, printboy, etc.), but has anyone actually DONE it with professional looking results? What type of printer do you use?