Just replaced the one on my 2.6, simple enough to do as per the guide though I never took any of the inlets off. Biggest problem was that I really needed a short extension bar as the one I originally used put the torque wrench tight up against the aircon pipes.
When I removed the front pipe I had an plastic vessel (an old clover tub!) to catch the fluid, I then wrapped the pipe end with a clean rag to stop it dripping everywhere, you can move this pipe towards the radiator and hook it out of the way then.
When refitting the replacement pump I loosend off the bolt securing the aircon pipe bracket to aid locating the pump, once fitted and the rear pipe reattached I refilled the reservoir with fresh fluid and manually rotated the pump until fluid started to appear at the front pipe fitting, reattached the front pipe (remember the washers) and reassmbled everything. started the engine, topped up the system, stopped the engine and removed the dirty fluid from the reservoir and replaced it with fresh. I then started the engine and moved the steering wheel lock to lock, removed and replaced the fluid and repeated this process until the fluid was constantly clean.
Should add, I did the above with the front wheels off the ground and took it for a drive afterwards to ensure there was no leaks.
Hope that helps.