Hahahaha.. sorry.. now that i've finished laughin.. just did this about 3 months ago..
1.. As above, strip everything out, 1st the handles above the windows, lights, rear vision mirror, both the sun blinds, than take the seat belts off.. Roof lining at the front isn't attached, at the back it has 4 metal clips that hold it in, if you pull down on the back of it where the rear window is it will pop out, just don't be too foreful..
To get this out, the passenger seats RECLINE all the way back, slide it forward than lean it back..
To get the sunroof out, pull the drainage tubes off, than make your way around the front undoing the brackets that hold it in..
Also - to get the roof lining out + sunroof out - you NEED 2 PEOPLE!!.. don't try this by your self, also put a towel over the dash.. it's not overly heavy just awkward.. any questions, let me know.. I've got a nissan servicing manual around here - but doesn't tell you how to get it out, just replace it....
Make sure you check everything is right before you put it back together as it takes some time..
NTB00_001.pdf