I think I do something like Rufus does:
I tack it in place about every 3" along one side of the frame.
Then, I cut it about a foot longer than the frame to which I'm attaching it, and wrap it around a 2x2. I then tack it to the 2x2. Wrapping it around the 2x2 prevents unbalanced stretching.
Depending on the frame to which it is attached, I get help with a come-along, tie the 2x2 to my bumper and get a lot of tension on the wire, or I just ask a friend to pull on the 2x2 for all they're worth, while I screw in a lath strip to the other side of the frame.
Not sure if what I just said is comprehensible; sure hope so.