...can anybody help me with my 2007 RRS? I want to take the PDC in the front out of the bumper... Do I have to remove the bumper?? Or can I do it from the bottom??

What is the actual problem? Why do you want to remove the PDC ( sensor ? )  16MY Estoril Blue SVR.............
17MY Autobiography Dynamic - Corris Grey - WOW.
14MY Autobiography Dynamic - SDV6 - Fuji White
12MY Autobiography - SDV6 - Santorini Black - Dual View - Rear Entertainment - Sunroof.
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...I am putting on a "spoiler" on the bumpe. It is not a real spoiler, looks like the 2010 model afterwards. And therefore i have to take out my PDC and put it in the new part. Sorry for my english!

To be absolutely honest - I would remove the bumper - Grill just pulls out - the headlights are held in by a clip that when lined up correctly allows the lights to be removed. It's then 1/2 a dozen fasteners on the top & as many again on the bottom. Then a pull from the where the wings meet the bumper will free the bumper - all that's left is the washer connector if fitted. If you google Powerful Uk for a youtube video there is a step by step guide - the only is if a bolt doesn't release under the bumper then it can be a pain - it really is an easy job. It may even help when fitting the lower spoiler. I don't know of a quicker way? Sorry. Good luck.  16MY Estoril Blue SVR.............
17MY Autobiography Dynamic - Corris Grey - WOW.
14MY Autobiography Dynamic - SDV6 - Fuji White
12MY Autobiography - SDV6 - Santorini Black - Dual View - Rear Entertainment - Sunroof.
12MY Autobiography - SDV6 - Orkney Grey - awesome ;(
2005 Java Black - 4.2 V8 Supercharged First Edition- will never be forgotten ;(

If you want to get the pdc out then its a bumper off job, easy enough, however be prepared, the bottom torx tend not to want to come out.

Next the hose for the washers, the t piece WILL break if your not careful, it's only 12 quid but a pain in the ass.

10mins top to get off as long as everything goes well, 2man job if you don't want to drop the bumper  If you took some fog and put it in a jar, would it be missed.

... I will report and post a picture...