Originally Posted by Edvinas
The guy claims that program wraps official Pentax DLL he got from some Pentax service man. All the communication with camera is done by that DLL.
If it's true it is quite safe to use it.
... except that, by the time it gets passed around the internet a few thousand times, it is almost certain to pick up a virus or two. While I seriously doubt that there are any viruses that can attack the firmware in a K10D or K20D, once an infected DLL is called, it can do whatever it is that viruses do to your computer.
If you come across such a DLL, scan it six ways from sunday, with every antivirus program you can find, before you try to use it.