Ah… ok. I didnt see the
Ah… ok. I didnt see the shoutbox until now. Botfin should change this indeed.
@ Botfin:I do not want to complicate things, if so then ignore this following:
Maybe handy to know that a diode (also the one inside a transistor) in the schematic looks like an arrow, thats the direction the current will flow. in the opposite direction it blocks. And current always flows from positive into negative in a circuit. The protection diode over the motor must always be placed backwards (so it doesn’t passage when motor should be on and fry the transistor!) as seen in the schematic.
I still can remember that I was new into electronics and this kind of basic circuits, and it took a long time, and lots of fried components 
and hours of thinking and frustration why it doesn’t work as it should. But eventually you succeed and you’re the proud owner of your robot that completely drives by itself. So just keep trying.