Recently I had to write a program that runs on Pocket PC 2003 and utilizes built-in barcode scanner (HandHeld product). Writing software was simple; Installation was even simpler. However, every time I performed hard-reset, my newly installed software disappeared. I quickly noticed that HandHeld demos were installed automatically, so I started research. Looking on the web did not reveal much. I assumed that there is a special folder where such autoinstalls are stored. After short time I found the folder:
IPSM/AutoInstall/
Simply copy *.cab file inside this folder and your program will be installed at each hard reset.
I looked into regular Pocket PC 2002 and could not find the same folder, which leads me to believe that this could be HandHeld device specific.