Cheers - did it today and it was indeed fiddly, ended up taking out the rear seats, C pillar covers, and parcel shelf to get to the hinge bolts. The ones nearest the windscreen are a real pain as you can only reach them with a spanner which is slow work. Changed one hinge a time like you said which made things a lot easier.
Boot is working like a dream now, very pleased indeed! Thanks for the advice, much appreciated.
Vinny