Okay - I'll go back through the PC building tutorial and see if I have any questions.
For info, this is the Juno case:
'Superb specification full tower case with 6 x 5.25" and 2 x 3.5" bays concealed behind its flush fitting door. The Juno P6 is twin PSU cabable with removeable 2nd PSU blanking plate and has a convenient swing-out motherboard tray. Cooling potential is superb with no less than 5 x 80mm case fan apertures - 2 front (1 x 80mm fan supplied) and 3 rear.