Bongo Fury

I want to replace the inner lifting roof panel of my Bongo and had a quick look this morning. It appears that the hinges are bolted through the roof and the bolts are under the headlining.

Any tips for removing the headlining and is it a big job to get to these bolts?

This might help.
http://igmaynard.co.uk/bongo/forum/view ... ng#p409314
Miss Fixit's post.