Take a wire hanger bend it straight. Use it as a probe to get rough guess as to how long the hive is in the tree. Then add an extra 20%.
Place screening over the entrance and wrap the entire area again. Look for anything that might be an entrance.
Have the tree trimmer trim all surrounding branches. Except ones that might be useful for support of the section you want.
You will then need to get some rope and securly wrap the section of the trunk that the bees are in. If the trunk is split like a Y and you can use the thick branches from the other side of the Y that is great. If not you will need to have a lift or something that can support the weight of the trunk section in mid air.
Cut the low section of the trunk and be prepared to cover it with screening right away if you didn't guess deep enough. Don't forget to then cover the upper section you just exposed also.
If the cut went well, lower the trunk section into the truck or trailer gently. And secure it so it won't roll around.
Drive home. When you get it home if you can put the branch in a position similar to what is was that would be great.
Use a cone method to get the bees out.
Notes. These bees will want to abscond after moving the trunk around. You have a very high failure rate with this type of removal. http://www.brendhanhorne.com/coppermine_dir/thumbnails.php?album=42