Hi Franceen George

To select several pieces (any pieces) in Punch, hold the Shift key

Regarding your disappointment, the DWG import feature in Punch AS 4000 works fair, so perhaps you should check few things

1) Did you check if you are working in the same scale of the plan your imported? Did you check the lot dimensions? (Power Tools--> Topo designer)?
2) I am not sure what is a "real set", however, to get a 3D model from a DWG file, you just need the instructions from the manual ("Once you have imported your file, you will need to convert the lines into Punch! intelligent objects before they can be views in 3D"). In other words, select the lines --> convert to (walls, fences, etc)

Let us know if you need additional help

Patricia