screenshot
Not sure this is much of a recommendation, but if you need a free app that takes a screen shot of your Scroll then screenshot from GIKsoft seems to do the trick. You need to have a rooted scroll though. I think this is the case for all screen capture tools I looked at. You set it up to take a picture 5 or 10 seconds or so in the future, to give you time to navigate to the screen you want. Then you hear a camera shutter sound so you know it has taken the snap. You can also shake the scroll but I haven't tried that method. I had to set the option Invert Red and Blue colours otherwise the colours came out funny. It saves the pictures to /sdcard/screenshots which you can't change, so a bit tough if you don't have a sdcard. Example attached. It seems to crash quite a lot but as it's not the sort of activity you do very often it doesn't really matter. Why this function is not built into Android defeats me.