i started with the sunroof apetauter, use pegs to strecth the rest of the headlining out towards the windows, then i used small amounts of super glue to stick it in postion on the edges.
its not an easy job took an afternoon obviusly all windows need to be out, like i said use pegs to keep he head lining in postion and use the proper clips or small dabs of super glue to fix it in key positions, then just refit the ribbers and away you go.