The following command-line, ommosaic imagesets=''image1 image2 ...'' mosaicedset=mosaicedimage.fits mincorr=-0.5 correlset=correl.fits stacks the images image1, image2, and stores the stacked image in the file mosaicedimage.fits and the correlation images in the file correl.fits.
The difference between this command-line and the previous one is that the negative mincorr value indicates that all the images will be stacked, regardless of the computed correlation coefficient.