There's a new site that brings together election protection stuff, including a number of short explanations by Stephen Spoonamore about how manipulating the tallies can be achieved.

Segment 1: http://www.youtube.com/watch?v=ZAyEfovA404
Segment 2: http://www.youtube.com/watch?v=vTBLfgos5b8
Segment 3: http://www.youtube.com/watch?v=SzKbigGoMoo
Segment 4: http://www.youtube.com/watch?v=9vNvweInGFs
Segment 5: http://www.youtube.com/watch?v=rX8fRwsTpoQ
Segment 6: http://www.youtube.com/watch?v=m9Kq4dxPwY8
Segment 7: http://www.youtube.com/watch?v=AsgY4_BB2lo
Segment 8: http://www.youtube.com/watch?v=Jy1sz-xBxf8