First thing--while a razor blad is still in the wrapper, break the blade in half (long direction, so that you end up with two full length blades). Next pull the red insert out of the shavette (it should slide right out). Open the red insert, and you should see one side that has notches on it. Place the blade inside the insert and use the notches to align and hold the blade in place. Carefully close the red insert (be sure the blade is still in place) then slide the insert back into the shavette holder (the insert will only slide in in one direction). If you are still having problems let me know, and I'll see if I can dig out the camera. Good luck!
"Better to keep your mouth closed and appear a fool, then to open it and remove all doubt." --Mark Twain