came across this website while surfing in dpreview. find it's really ingenious!
http://www.sentex.net/~mwandel/tech/scanner.html
http://www.dpreview.com/forums/read.asp?forum=1000&message=2652891
http://www.sentex.net/~mwandel/tech/scanner.html
http://www.dpreview.com/forums/read.asp?forum=1000&message=2652891