Are you trying to mount the drivers on the Protoboard?
Having your own boards made up may be easier. The eagle files are publicly available.
It is very easy to send out to get your boards made up. My CAT4101 drivers only cost 99cents a piece.
If you go this route, all you have to do is connect your power supply and the PWM signals from your Arduino. It is much easier to troubleshoot separate modules than trying to put everything in one package.