there is a plugin called DCraw fro imagej, reads in raw images, and can save as FITS or other. Yoo can save the image as JPEG and the use Astrotorillia to solve the image coords. It should work is Astroimagej, I'll try it a bit later.
http://ij-plugins.sourceforge.net/plugins/dcraw/
I learnt something today , some one has already made imagej into a more useful astro tool.....8)