Did this job myself about a year ago now and found it straight forward enough on my 2.5 manual 2005 facelift model.
I purchase the require wind back tool from Halfords for £20 or thereby, which made the job easy to do.
I bought my Pads and Disc from EBC Brakes Direct on-line and they arrived the next day.
Hope this is of assistance to you. Total cost last August for 2 Discs and Pads = £129.81