Id like to show you what Ethermine and I did to our Nintendoo DS's last night:
He bought a full body case which was clear green and we installed it onto a pink DS, and I took some parts from the pink DS and added them to my white DS, here's pics:
Here is the bottom of the DS opened up

here I am holding the L and R buttons on while clamping the case over the body

Heres what the top looks like clear Green

Heres the inside once I was done

Here is the Bottom of the DS (look at the pen!) xD

here it is on and fully functional again

Here's what I did to mine, I added some of the pink pieces:
the inside of the DS

The bottom of the DS

The inside again

It was quite an amusing experience. taking the DS apart was a lot like a cellphone, there was a gold ribbon between the top and bottom pieces for data that rolled up and the buttons and all were just like a phone. It was quite hard at first because of the video we watched of someone else taking the DS apart was hilarious and uninformative.
http://www.youtube.com/v/vRzTgfo2PsM&rel=1It kept the night cheerful cos of his accent we couldn't figure out what nationality he was, and well.. it was just funny. But it helped a lot! x)