So I'm working on switching over all the LEDs on my system to red... I've already replaced the power indicator ring LED, I destroyed a disused optical mouse from the shop to get it; the HDD indicator, I spared a mini-laptop mouse by replacing the LED I took from it with the blue LED from my power indicator ring (I gave it to my girlfriend for her averatec, "Bubbles!"); now the FDD indicator is done... I actually bothered to take some pictures this time since it was more than switching a LED held in by clips.
1. What I started out with... a new, black FDD (in blue plastic), tiny (not sure what size) red LED, soldering iron and aluminum plate, solder coil in a tube, large jewelers philips screwdriver and the FDD I busted apart to see how it all worked. They're like $2 wholesale and I like to break shizzle.
2. / 3. Removing the casing from the FDD
4. After soldering the new indicator LED into place... I wish I had a better picture of this because the beads were perfect.
I had a lot more pictures (showing each step) but my digicam is a POS. The weird thing was that the long lead on the LED went to the solder point closer to the front (they were staggered)...
So here's a short video I took and edited to fit the size requirements of the board... I cropped it down so it's only showing part of the frame, but it's all you need so deal with it!
That's my DSL modem blinking next to the case... I didn't cut it out of the frame because it makes it more obvious that it's an actual video and not just three pictures looping...
You can see the power ring in this (it doesn't go dark on the sides like that so I'm not sure what that's all about.) but sadly the HDD wasn't accessed while I was doing this so you don't get to see that one. I'm sure you'll survive though.

available if you need it...