What bulbs do people buy to de-Tango their Orange indicator lights on the rear clusters & front lights (fully legal ones only)

Silver coated ones are ideal.

Just bought a new front set myself.

http://pages.ebay.com/link/?nav=item.view&id=270914772559

Seems a simple, effective, good looking and cheap little mod

Are they easy to change on a mk 7.5 Fiesta ?

If it's anything like on a MK2/2.5 Focus you'll have to remove the headlights/tail lights.

I'm looking to order a new 7.5 Ecoboost Zetec S in the next couple of weeks so I'm planning ahead as I have afew plans for it

I did front , sides and rear on my 7.5, hardest bit was the side mirror caps. Really are stiff, and when the cover comes off it sounds awful, almost like it's snapped but it's normal.

If you do the door mirror repeaters, it may be worth warming the covers up first as the cold weather will make the lugs more brittle. A hairdryer is a good item to use for that, just don't get it hot enough to cause any distortion.

Do you have to remove the lights on a 7.5 ?

Do you have to remove the lights on a 7.5 ?

Yes.