... In order to overcome undersampling, two or more frames of the same field may be obtained which are shifted with respect to each other by fractions of a pixel. ... Obviously science programs such as photometry of dense star fields and the morphological classification of distant galaxies would benefit from a method allowing a proper combination of two or more ``dithered'' WFPC-2 frames, i.e., frames that are shifted with respect to each other by fractions of a pixel. ...