Step 2: Soldering - The most dangerous step
Solder together the power supply for the servos. (fig 1)
Solder together the power supply from the battery packs (fig 2). Repeat for the other battery pack.
Solder the male pins of the molex to middle four holes of the BlueSmirf. (fig 3) PCB soldering is different from wire-wire soldering. There are lots of youtube videos to help you learn how.
Solder four wires to the female end of the molex. (fig 4)
Solder together the power supply for the DisplayDuino and ServoBoard.
TIP: Check that your connections are good. You don't want to have to repeat this later!