**EDIT**
I updated the photos with a model you can see better from (except for step 51, I was past that when I realized I forgot them, and didn't want to unfold the model).
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Cool...we'll work our way from 51 then. I apologize in advance for my crappy photos, please let me know if you need me to take them again with better lighting.
Step 51 is wrapping a single layer from behind the little leg there to the front, like this:
Step 52 creates an extra flap from the middle of the paper, like this:
Step 53 folds the top two flaps over, and like it says, the model won't lie flat.
Step 54 is simply swiveling the bottom layer out from underneath. it won't lie flat, and don't reverse the direction, just let it hang there like this:
Step 55 can be kind of tricky depending on the paper you use. Take the right side and slide it over the left side, keeping the triangle on top on top. The end result will look sort of like this (which is spread apart so you can see the details):
Step 56 is just folding the flap from 54 back underneath. This is what your triangle section should look like at this point:
Step 57 swings the left side of the small triangle up, flattening it.
Step 58 is another of those cursed closed sinks, which is to say, popping the large triangle inside the model without unfolding anything.
Step 59 then is simply folding the two flaps from 53 back over, closing the model back up.
Now you get to do it all over again on the other side! How exciting.
Hopefully this helps a little bit... Please ask if I confused you further or if you have any other questions. Have fun!