This is going to be a really basic guide as I havent the time to write an essay atm. (even though i have lol!)
To start off with, ensure your sills on the car will take the weight of the car, try to brake bits off in your fingers, if its all secure good, if not i suggest stopping now.
Couple of quick notes:
I had the wrong discs / pads but this guide still applys to all fiesta owners.
I had no axle stands - I do not suggest doing it without.
Tools needed for this job:
> Jack x1
> Axle stands x2
> Necessary wheel removal tools including locking wheel bolt key.
> 3'8 ratchet.
> 13mm socket, half inch drive preferably (or step up from 3'8 to half inch)
> Breaker bar - prefered, or big upper body muscles (why make life hard for yourself?)
> 7mm allen key / allen key socket.
> Copper slip (for greasing pads)
> Some type of emery cloth (sp).
> pry bar / tough screw driver
> grips / g-clamp
> wd40
Sounds like a lot of tools but thats just the minimum (not many there when you have them infront of you).
Start by jacking up the car and supporting the entire front end securely.
I am not going into details but jack each side in turn, and replace jack with axle stand under sill.
Take both wheels off and position them / or old steel wheels under sill incase car slips for any reason.
Turn the steering wheel / wheel hub/disc so it is on full lock.
Undo the calliper bolts/threaded retainers (hidden under plastic caps..remove these first)
Remove the spring holding / tensioning pads into the calliper ( i assume ).
Pry the pads away from the calliper with a screwdriver / pry bar.
Now take pads out of the carrier and lay them to one side (friction side up incase you need them again.)
Undo the two pad carrier bolts (13mm)
The disc should be a bit wobbly at this stage and the pad carrier should come off complete.
Remove disc at this stage aswell (just pull it away from the car. self explanatory).
Clean up the areas where the new disc will sit (i.e behind it).
Clean up the areas where the pads were sitting in the pad carrier.
Give all the rust in the area a bit of a rub down anyway just to make it look neater.
Grease pads
Put new disc on.
Put pad carrier back on (perhaps put lock tight on the securing bolts - 13mm)
Clean up the calliper retaining pins/bolts (7mm allen key type)
Push piston back into calliper using a g-clamp/grips, grab the calliper with with grips and just push the piston back in all the way (i have no image here. i will look about for one perhaps.)
Slide the outer pad into the pad carrier (now it is greased).
Push the inner/piston side pad into the piston so it clips in.
Replace the calliper, make sure you tighten up the two retaining pins (7mm).
Replace plastic caps that you took off (to protect them).
Replace spring that you savagely attacked earlier and nearly took your eye out with.
To do this, put the bottom end in first, tap it gently with a small hammer/guitar/banjo.
Position it so as when you push the top one in, the spring is under tension.
Grip the spring at the top with some small grips (in my case zoom's wire strippers i stole a few months back), now push forward into the hole and twist it back around the back of the calliper. (hard to explain.)
(images)
Make sure everything is all tightened up to specific torques / f*kin tightly
Replace wheel(s) and do the bolts up as tight as you can, let the car down off the axle stands.
Torque the wheel bolts/nuts up to around 100nm or again f*kin tight.
Admire your handywork have a few beers.
Important safety note:
Brake pads need to "wear in", so make sure you brake really early and take it easy on the brakes for a good 100 odd miles.
Once the pads have bedded in you should be alright!
Important safety note 2:
Pump out the brake pedal (ram it to the floor a few times until it is rock hard).
If you forget to do this the brakes just wont engage when you pull out of the garage/drive and you will stack your car into a tree / person / animal / g0at / small child / tiger / bear / giraffe.
Important safety note 3
As i said before, make sure the car sills are not rusted, here is me admiring the damage afterwards
:
And finally to disclaim myself:
This guide is put here purely as minimul instructions on how to change your brake pads or discs. I am no way held responsible for the work you under take on your own motor vehicle.
Because brakes are of a serious nature, you must take your time and do everything properly. Please accept that this is just a guide for you, and any breakages, fuckups and crashes are not down to me.
Thanks, and i hope this helps a bit.
For those that have noticed / are wondering:
Yes i did put my old pads and discs back in,
why?!
Because the arsehole at work sold me the wrong discs and pads (for an '89 fiesta).
Its hammer time.
Paul
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Well done! 
)
