I really appreciate your work both on Hfs & Hsg.
Talking about Hsg, as the pictures are screen caps, they often use few colors, so you'd obtain better results using png-8 file format. My tries show an excellent quality for about 70 Ko/image on my 1280x1024 display. The images are very much cleaner than with jpg.
There is an open source component for pngs in Delphi : http://pngdelphi.sourceforge.net/
that is very easy to use.
Bye & keep the good work !