Each color has its own unique part number. You say your car is silver, I'm not sure if you mean Titanium Metallic 1D4 (Part #PT29A-03075-01) or Classic Silver Metallic 1F7 (Part #PT29A-33085-01).
Part #00012-90883-02 seems to be extremely similar-- I'm not sure if it's the newer version (as many dealers stopped selling the original parts for a while) or if it's aftermarket. I'd call your dealer to ask, or email one of the websites that sell them.
I am extremely satisfied with how they look, but others absolutely hate them. You'll have to be the judge- as I think some colors look better with them, some look better without them.
Everyone that I know that has installed them says that it was extremely easy. Here is a link to someone who asked a similar question on the Greenhybrid Forum
http://www.greenhybrid.com/discuss/f...oldings-18876/
If you look at post #5 in the above link, you'll find an additional link to a PDF that has the instructions.
You'll also find this link, which sells the parts you need at a pretty good price. (cheaper than most dealers) I've never bought them from here, but others have.
http://trdparts4u.com/MC-DDII-I.aspx
Good Luck