[DavidLJ (David)]

Very likely your image acquisition software will have a mapping feature that lets you plot and remember the position of a few stars in your camera's on-screen output so that you can re-point your camera at exactly the same place when taking further exposures at a later time. But if it doesn't or if you would like to try an alternative program I've created ImagingMap which can be used with any acquisition software. Perhaps its main point of difference is that it lets you add captions to your plots which can help you remember which star each plot refers to. You'll find it at http://davesastrotools.weebly.com