Many authors do? Damn, I thought I was the only one - someone pick up on my idea? Ha!
Okay, there's no secret really, I recreate my stationery designs in word. There is no one button conversion.
I export all graphic elements, work them into the word documents and align, and then align all text elements to be 99% identical to the Photoshop originals. (it's as good as impossible to get 100% identical layouts)
It's a hell of a lot of work, and Word is a pain in the neck to work with , but it does facilitate use for non-design savvy end-users.