Mark, I just got through getting my plotting setup and you're right, it's not much different than before. Just took a minute to get the .PC3 and .CTB files in the right Civil 3D folder. The Dialog Box looks a little different, but seems to work the same. If you print to file as I do, after you hit Okay, the Browse Dialog Box pops up to set the file location and file name. The file location is no longer a part of the main Plot Dialog Box.
Plotting looks the same, but everything else is a whole new world.
Ken