Actually its very easy, as follows
Disconnect the battery
Disconnect the MAF plug
Take off the Air Intake hose [2 x hose clamps ]
Remove the Belt [ take a photo of how its installed first ]

Remove the Positive terminal that's on left tower [ behind the air box, other wise you WONT be able to remove the air box ]
[one nut at the bottom of it ]
Remove the Air Box [2 or 3 x torx screws ]
[This now gives you a heap of room to work, and lift the alternator out]
Remove the Power steering pump from the bracket, and let it lay to the front/side with out leaking fluid [2 or 3 bolts]
Unplug the alternator
Remove the bolt for the support bracket at the rear/back of the alternator [ 1 x bolt ]
Remove the bolts at the front of the alternator, and slide them out while supporting the alternator [2 x bolts]
You should be able to lift it out through the top.
Hint: When re-fitting the new one, loosen the alternator bracket from the engine, this will make it easier to re-fit the bolts for re-assembling it.
As soon as you get the alternator mounted, tight the Alternator Bracket bolt
Then tighten the Actual Alternator Bolts [ 2 bolts ]
Re-assembling is the reverse of above [being generous with times, and not rushing it]
Removal is approx. 45 min
Re-assemble is approx. 45 min
Hint: Check all the bolts twice, you would hate to miss one.