The cloth room works nicely with raw OBJ files.  I use it that way all the time.

You may not be able to wrap the net entirely around a human, but you could get
it partway around.

Place the human horizontal, with the net horizontal over the human but not touching. 

Scale the net up or down and move it around until you can tell that it will
drape over the right parts of the human.

(This is the hard part, and will probably take several complete tries to get it right.)

Set the timeline for 30 frames or more. 

Select the net; get into the cloth room; Clothify the net.

In the "collide against" dialog, pick the parts of the human that need to be
surrounded by the net.

Start the simulation.

When done, get out of the cloth room and find the frame that looks best.
With the net still selected, hit Object : Spawn Morph Target, and give the
morph a name. 

Save the net as a Prop.  It will then have a morph that pulls it into the
position you made with the cloth room.

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