Ok, I got it to work sort of. If I open a standard letter document with master text frame selected, CMD+SHIFT click page 1 to override master items, and Place the document, it flows the entire thing, .doc or .rtf. You're right, it's pretty strange. I've watched several tuts on flowing and I'm sitting here going, now why doesn't mine do that?! Also ran into another weirdy. After I got the document flowed, I went into the master and resized the page to 5.5 x 8.5 and reset the margins to what's required for the book. Then I proceeded to resize the master text frame thinking that it would do this to all the frames in the document. It does (woo!) but when I brought the horizontal dimensions in to match my margins, the text in the document disappears. It doesn't if I go into the pages and manually manipulate them though. Which is fine, since I've saved a TON of time with the autoflow. But it's weird. Anyway, you can ponder that for a while and I will go resize my frames :)
OkieChris