I use Flat Rate Plus software. It can be purchased at www.flatratesystems.com It costs $2,500 and you print your books from the software. It is geared for the residential and light commercial market. I haven't used it for industrial machinery. You could create a new catagory in the software for industrial machinery. The software lets you choose what you want included in the book when you print it so you could print a seperate book with just the insustrial machinery catagory in it.

LK,
What flat rate system are you using?