i take it you have the bumnper with horizontal bars going across and tear drop eyes on either side.
Steps to take.
Remove bumper:
8 screws to remove.
2 in each wheel arch up in the corner
2 in front of bonnet, visible when open bonnet
2 underneath car cant miss them really
Remove middle section:
I let a body shop do this for me it was quite cheap and i wouldnt know where to start. But this is what they did:
Use hacksaw or jigsaw to remove bars in middle, cut them flush to bumper, to leave holes.
u see cut away bits to fill in the holes from behind and fill them out with body filler sand and spray.
Cut mesh to size and fix with strong glue of fibre glass