It's an easy enough job and costs very little to DIY. You will need;
1.5m x 600mm vinyl (should cost less than £5)
A sharp knife (scalpel or craft knife)
A squirty bottle
An application sponge (not 100% needed but handy)
Hair Dryer
Start by placing the vinyl in position onto the windscreen, secure onto the wing mirrors with masking tape.
Fold back the top of the vinyl to expose the top of the surround.
Peel back the backing and cut it off.
Fill your squirty bottle with water and add two drops of washing up liquid. Spray a light mist on the surround,
this allows the material to be re-positioned and easily worked into place. This is not needed with the expensive vinyl as
it is designed to have low initial tack but the cheap stuff does not have this so water will help.
Fold the vinyl onto the surround and work out any air bubbles with the application sponge (a credit card wrapped in a soft cloth will work nicely)
Once all of the vinyl without paper still on is applied and air free, use the knife and cut about 1 inch inside the surround
to remove the excess material.
Now remove the backing from one side at a time and apply it working out the bubbles. Start work on the inside part of the screen using the sponge
to work the vinyl into the edge of the surround. Once it's all in use the knife to trim all the excess.
Use your fingers to rub the vinyl over the stright outside edges of the surround (just top and sides)
Once this is done use a hair dryer to fold the two corners over. Slightly tension the material on the corners and heat a little with a hair dyrer.
This softens the vinyl and allows it to be stretched over the curve.
Cut off the excess on the outside edge and your almost done.
Heat the full surround to a decent heat with the hair dryer, this releases the tension caused by stretching and dries the water
which activates the glue creating a strong bond.
Job Done
Good Guide and about time someone did it 
Handbags ready!!!!
