I used the same one on mine.
I used my old headlining as a template. Cut it to the same size as the headlining, but I allowed an extra inch or two at the front, so that it slides into the metal cavity (where the sun visors are located). Also, cut the plastic underlay slightly larger on than the original (on the sides), so that it slides into the side cavities running alongside the inner roof from the hatch to the front windscreen. Install the cut plastic from the inside. There is no need to slide it in from the rear hatch. Adjust as required by cutting bits of it so that it fits into place without holding it in place. Make sure you are happy with the fit.
I covered the tile tile underlay with grey felting. I cut the felt to size allowing for an extra one or two inches, so that it folds underneath. Allow again, a bit extra at the front. Lay the cut felt on the floor. I then sprayed the cut underlay with copious amount of adhesive on one side. Carefully, place the plastic in place on the felt. Once in place, spray adhesive along the sides, and fold the excess felt into place. You will have to cut the felt in the corners so that there is no folding. Once it is done, to keep it in place whilst the adhesive is drying, I shoved the finished covered headlining under our living room carpet.
When dry. Do a trial run. Try to fit it into place. There may be tight areas because of the felt. Trim the excess felt as required until it fits. Make sure once again you are happy with the fit. DO SEVERAL DRY RUNS FITTING IT INTO PLACE.
Now the tricky bit!!!!! Installing the headlining. You have ONE attempt at this. Hence the dry runs.
I sprayed lots of adhesive on the metal roof, that is, a third of the roof on one side. Carefully, install the headlining on one side (sideways), ensuring the side gets into the cavity running along from the rear hatch to the front windscreen. Also ensure, it is also slides into the front cavity (sun visor area). Also, make sure it is fits nicely at the rear hatch area.
When in place, with two thirds of the roof without adhesive. Test the fit once more, by effectively installing it fully. If you are happy with the fit. Spray the center third. Press it into place. Then spray the final third. It might be a bit challenging to fit the final third, as you might notice, there is an area that for some reason didn't fit well. You can still make some adjustments. Try not to damage the felt.
To keep it in place, I bought those pine bead mouldings. It is quite flexible. I cut it so that it runs across from one side to the other. Each end must be forced into the cavity, so that it flexes upwards towards the shape of the roof. You may break a few of these. I installed four of these to keep the headlining adhered to the roof.
At the rear, you can pull it down a bit, and spray adhesive to reinforce it, then install the plastic screw plugs.
The adhesive doesn't last. I then covered the pine bead mouldings with felt.
That was a couple of years ago. It is still in good nick!!!!!!!!!
I forgot to mention. I installed one of those lightweight Dynamats on the roof beforehand.
Good luck.
I'll post some photos.