Having taken off my 04 facelift rear bumper twice, heres the script.
There are 2 torx bolts under the bumper at the silver part.
You need to remove the fog/reverse lights as there are 1 philips screw under each. Allen key into the 3 screws removes them.
Remove the scuff plate in the boot, 6 screws. set in 2s left, middle, right.
This lets you get to 5 scrivits, these are best removed with 2 flat head screwdrivers to prise up the inner parts.
You have a 5 door? I have a 3 door, so this part changes as under the plastic arch cover there is a philips each side. 3 doors need the whole arch taken off. I think you only need a small part taken off.
If your refitting then be carefull of the indicator/brake lights as they are allen key to remove. Also if your removing parking sensors if fitted. then disconnect them CAREFULLY, they clip out the holders and get pushed back into the inside of the bumper. The holders push outside to the painted side of the bumper.
This should help you.