Hi, I just changed mine Wednesday night after trying on Sat with the incorrect part - recommend going to Andrew Page Spares.
Like everyone says it's a ba@@ard of a job, just a few words of advice.
1 - Get plenty of jubilee clips (don't try to get them off to re-use, just cut the b@@tards off and save time)
2 - Take the battery tray out - there's a few hidden nuts etc (this will give you much more room to work with)
3 - As mentioned before just bend the EGR bracket (bottom left nut on the thermostat housing), unless you have time to take all the stuff from the top of the engine bay. Not need to put the bracket back on it's fixed on well enough and it's difficult to get to the bracket).
apart from that it's done a fantastic change to my car, now getting a good temp (checked via FiatEcusan before) warms up much better/quicker and now returing about 38mpg compared to 29mpg (on a 2.4jtd it's not funny).
Hope this helps.