What else did you purchase? If you don't mind me asking?! Obviously the discs, pads etc?
i bought the brembo discs, ferodo ds2500 pads and HEL braided lines from Auto-Nation.co.uk
fitted the discs and pads are pretty straight forward, although daft as it sounds you have to file the ends of the pads down a tiny bit as its a tight fit if you dont, you need it to have some movement (1mm top and bottom) in the carrier, as if its too tight the pads will squeal.
hope this helps