yeah going pretty well mate cheers!
What would be the easiest would be to take the interior trims panels off, A, B and C pillar interior panels and anything else that gets in the way then lower it down so you can gain access. You don't have to remove it from the car, you dont even have to lower it much just enough so you can use Self adhesive Strips on the roof first then onto the inside of the headlining. The stuff we are using at work at the moment is VELCRO pads and it's the BOLLOCKS at keeping the head lining up!
Hope it helps ya mate