I took the liberty of writing a quick and dirty guide to narrow band SSTV using MMSSTV. You can find the first draft at http://www.obriensweb.com/narrowsstv.htm . It is a little graphic rich, so it may take a little for the page to fully load. Hopefully the images display OK on the average PC monitor, I used a widescreen 22 inch monitor when composing the document. I will improve the document over time.
The document describes the basics of setting up MMSSTV to do MP73-N and gives detail about how the templates and macros within MMSSTV can be used to achieve some aspect of keyboard QSOs with SSTV , rather than the traditional SSTV talk-and-then-send-a-picture method. Comments appreciated. -- Andy K3UK www.obriensweb.com (QSL via N2RJ)