Pound the first t-post in the ground with a post driver. Make sure the flat area (near the bottom of the t-post) is firmly in the ground where you can't see it anymore.
Lay the panel on the ground to check if the wire arbor is where you want it. So it's straight.
Pound the second t-post in.
I left about 18" of open space from the ground to the edge of the panel so I could weed and the arch was higher towards the sky. If you place the edge of the panel on the ground make sure someone (who is tall) can walk under the arch.
I wired the panel to the t-post on post 1 and post 2 in about three or four areas.
This part is sure a lot easier if you have a second person helping.
On the non-attached side of the panel walk the panel towards the wired t-posts. This will form the arch, pay attention where your feet are to get an idea where the 3rd and 4th posts are going to be pounded in. Don't forget to keep both edges of the panel about the same distant from the ground. Be careful with this part because the panel wants to stay straight and could hurt you if you let it go.
Pound in the 3rd and 4th posts, wire the panel to the t-posts and enjoy your new wire arbor.
The t-posts can be painted before or after, I painted some and forgot to paint other t-posts.
Please excuse my t-post terminalogy.