HO Catenary/Acela Cat.

[hustlerose]

So, this is my first post on here, and I do know that there have already been several posts on catenary, but I have a few questions for the community and the Bach Man that I feel are somewhat different.
For the Bach Man- The catenary system on the Acela express set is nice looking, do you remember what make it was, or scratch built?
And now for the rest of the community, while there is a good amount of knowledge on the internet about the making, I am also looking for a book or something in hard form. The only thing I have really found is Marklins book. Does anyone know how good of a resource this will be considering I intend on using model memories PRR/NEC cat.? I am pretty new to this so any insight or suggestions would be greatly appreciated!