Success! Just as Boeing 737-800 says, I downloaded the msstdfmt.dll file directly from ronzie's link, using "DOWNLOAD ZIP-FILE >" button on that web page (never mind the "scroll down to attachment=30496:msstdfmt.dll 1 page" stuff). Extracted the zip to a folder and copied it into windows system32 and syswow64 folders, then, using command prompt, unregistered and then registered it. Bingo! It is important to get the spacing and the spelling right. I made several typo errors at first. The more frustrated you get, the more likely you'll screw it up. I think that a lot of the frustration people are having is with the wording of the solutions. A few correctly placed quotation marks, succinct phrasing and more careful typing would go a long way but I guess we can't expect computer geeks and pilots to be grammar geeks as well. I've just upgraded from XP 32 to Win 7 64 so doing complete re-install FSX. Now I can move on to the next problem, whatever it may be. There's always something but it's always a good learning experience. Thanks JD, ronzie, Boeing 737-800, and all other sufferers.