hi
I have a Pentax k100d and i installed the Remote assistant 1 software on my pc and when i plugged my camera in it appeard to work half the time because i could take a few photos and save them to disk they were perfectly normal just somtimes the computer lost connection with the camera but other wise it works.
I got it to work by first plugging the camera into the pc and turning it on (the camera comes on then shows PC on the LCD on the top) then i started up the remote assistant software and after a few seconds once the the remote assistant software has started up some of the icons on the remote assistant software light up and "PC" dissappears from The cameras LCD replaced with the usual info.
Hope this helps,
Mike