I have searched on Instructables, and I'm pretty sure this plane is not in.
This is a very unpredictable plane. I have done many things with it, including:
Gliding across my school's indoor hall (around 50 metres)
Returning like a boomerang.
Returning not like a boomerang.
Going in the opposite direction of throw...
You get what I mean.
Step 1: Materials, and the starting folds
The first few folds are to create a (in Origami terms) "waterbomb base". You can see its construction in the next few steps.
Step 2: Waterbomb base, continued
Step 3: Waterbomb base, finished
Push the two sides in and the waterbomb base is done.
Step 4: Folding the "handle"
Follow the pictures.
A hard step is going to come, so watch out.
Step 5: Don't get stuck on this
Look at the pictures (sorry for the blurred pictures. my camera's macro wasn't that good.) Push one of the "flaps" into the pocket. It is a little tricky.
Repeat with the other side, and (hopefully) you have what is shown in the last picture.
Step 6: Stablisers
Fold the edge back to the side (I'm dizzy already), and repeat on the other side.
Now, straighten them out till the angles are about 90 degrees (or 100 grads or pi/2 radians).
If you want, you can fold in the two back corners to act as elevons. I prefer it to be flat, as it performs beautifully.
You are officially done with the plane! Now to learn how to throw it.