This is straigh forward enough to do

As said, unbolt all the bits from the head making a note of and wires you unplug so that it will make it easier to put back together.

Once all bits are off, remove the cambelt cover and take a look at the top pulley and you will see there are 5 or 6 holes and in one of the holes is a pointer, turn the engine over using the bottom pulley bolt until the pointer lines up with the dot on the head, (12 o'clock position) now check the bottom pulley and make sure that the nick in the pulley lines up with the marl on the lower plastics, if you cant see it then turn the pulley again until you have both marks lined up.

Once this is done loosen off the 2 bolts that hold the tensioner and then slip the belt off.

Pop the rocker cover off and loosen all the rockers or remove them completly.

Now it is just a case of undoing the head bolts, but there is way you must do this to stop distortion, it is something like the middle 2 first then work your way out to the edges, undo the bolts only a bit at a time to remove the pressure.

So you would nip off the middle 2 and then nip off the bolt to the left of the one nearest the turbo and then to the right of the middle bolt nearest the inlet, (hope this makes sense) and just keep going like this.

Make sure you get new bolts as they are stretch bolts in these.

Take the head to a good machine shop and they should be able to check if it is true or not

Get a haynes book, as this will help loads

Good luck, it is very easy

cheers

Rich