Yes, it's true the water pump has to come out but it isn't that difficult.
For a detailed explanation I would suggest you get the three vol. repair manual and/or the dvd-cd manual.They can often be found in the parts for sale section at a good bargain.
First disconnect and remove the battery and the rubber surround as it will be in the road for the accumilator removal. Drain the coolant for the water pump removal. Purchase new gaskets, they are cheap at any local autoparts.Remove the belts and hoses then I think 6 water pump bolts w/ a 10 mm socket?
First assuming your system is dry (all refrigerent has leaked out or escaped
) if not it should be removed with a refrigerant recovery system that most diy people don't have.
Raise the passenger side of the car and remove the wheel, this is to access the two lower compressor bolts. Remove the one bolt at the rear of the compressor attaching the lines to the comp. I can't recall the size 13mm maybe? Then the four (two upper & two lower bolts) one of the uppers looks like a stud but it but it also comes out. Un fasten the wire connector at the clutch and yank it outa there.
Note: if your replacement compressor was shipped with out oil you should try not spilling any from your old comp. as you will need to drain and measrure the amount to add to your replacement with new oil. The manual has a replacement amount for this ( I think 3 oz. not sure). I use PAG 46 oil available at most autoparts, I also use it to lube the o-rings although the book calls for refrig.525 oil.
The accumilator (receiver/drier) has two tube fittings which are hard to wrench (very close quarters) make certain you use a backup french on the fitting while loosening and tightening these! Remove the two srews holding the bracket to the fire wall (10mm maybe?) and again the drier should be drained of oil and measered for the new oil amount to be replaced. I found this difficult as the desicant bag inside tends to not allow it to drain out. There is a standard amount called out in the manual for replacement (not sure w/out my books 2oz. I think).
You did not mention the orifice tube (expansion device). If you dont have one of these you will also want to replace it. It is located inside the liquid (small) line which is very near the area of the engine dipstick.
It looks like another line fitting. Use a backup wrench and lossen the nut then pull the line apart. The orifice tube is inside the line toward the fire wall. Reach in there with a pair of needle nose pliars and pull it out carefully (it is plastic) it should also come out with it's o-ring. Take note of the direction of the thing so that you install the new one correctly, some have a tiny direction arrow and it should face toward the drier or fire wall.
Hope this helps some. Sorry I cant be more specific on oil quantities or wrench sizes.