I love the challenges in John Montroll's A Plethora of Polyhedra in Origami however the instructions get a bit sparse near the end sometimes.
The Icosahedron is an excellent example of this with the cryptic phrase that will haunt me for years to come 'wrap around the dark paper' which doesnt really explain anything.
I finally (after many attempts) figured it out (Im still not sure its correct but it works for me). Here is how to do the final 3 steps (43, 44 and 45) on page 21:
icosahedron island 001 
icosahedron wrap around the dark paper 001 
icosahedron wrap around the dark paper 002 
icosahedron wrap around the dark paper 003 
icosahedron wrap around the dark paper 004 
icosahedron wrap around the dark paper 005 
icosahedron wrap around the dark paper 006 
icosahedron wrap around the dark paper 007 
icosahedron wrap around the dark paper 008 
icosahedron wrap around the dark paper 009 
icosahedron wrap around the dark paper 010 
icosahedron wrap around the dark paper 011 
icosahedron wrap around the dark paper 012