I wouldn't use the boots before the lift, I guess 1 minute isn't too long. I do mine for 5 minutes after I lift and a couple of times I pulled a muscle on my low back just moving around the house. Once I sneezed and "threw out my back". I think it might relax the muscles so much that it's too lose and puts you at some danger until it settles back down a bit.
I think the table is a great tool to use. I also go to the chiropractor where he stretches me out on a horizontal table with a pulley. That table is better because it can be done a lot longer. Mine is about 15 minutes, you shouldn't hang that long because of all the blood flow to your head. They say there is a chance you can damage your eyes.
Another important thing about using a table, increase your angle of hanging slowly over the weeks. Start out at an angle that is not too steep.