Well done, Bari
I immediately installed the two programs you listed, and certainly got further than before, in that instead of saying that it couldn't find any scanners, Xsane displayed its two panels, and when I pressed the "Scan" button it fired up my webcam (yes, webcam), and I got a lovely colour negative image of me staring at my PC screen. Although I've always wondered what I would look like with blue skin, this was not exactly what I was expecting.
Same thing with Simple Scanner program.
When I unplug my webcam, then I get an error message saying it couldn't locate my scanner, with both programs. At this point I'll drop out of this thread, since it's related to HP 1210s, and mine is an HP 1410, and my problem is definitely not solved!
I'll start a new thread.