I just did my case this last weekend with flexo pet too.
I bought a pin extractor from radio shack
Link to help remove the pins, and that saved me hours. Warning: this is hard to find at a Radio Shack. I went to four stores before finding one. The trick is that it is stored in their file cabinent with the resistors. Took a smart employee to finally find it.
I also got the heat shrink tubing from SVC when I got the flexo pet
Heat Shrink Tubing Link. This is a definite must. The only problem that I had is that I didn't order enough flexo-pet for my project. I am waiting on another order to come in before I can finish it.
This was my second order already because I wasn't sure what size to order. I used 1/8" for my case fan wires (and cpu fan) and 1/4" for my power connectors. If you want the color of the wires to be hidden then you need to stick with a dark color such as black.