Thanks for your question regarding laminate. The manufacturers preferred way is for you to keep the flooring going the same direction, meaning as you make the turn the floor still locks together. This is how most people will do it only because it is the easiest and most recommended. If you want to 45 the corners and change direction, you can, but it is much more difficult. What you will need to do is get a laminate router with a nice sharp carbide bit and then spline the edges like you would with hardwood. That means you are gluing at the edges. The critical part here is what you use to cut the laminate flooring. It has to be sharp and perfect as every chip will show.
The 3rd option is to see if Armstrong makes a commercial flat t-molding. This would only be raised about 1/16" off the floor, but would allow you to fasten down the cut edges if you do the 45. I know that WilsonArt laminate makes this special metal t molding for this application, but I am not sure about Armstrong.
I hope this helps. IF you need anything else, please let us know.