Hi Steve, I'm glad you've made some progress. You can use dxf files very successfully in SprutCAM, all that you might need to do is join the geometry together to create contours.
You can view a short video tutorial here that I created some time ago on using dxf files in SprutCAM.
There have been some problems in the past with using imperial units in SprutCAM, but as far as I'm aware it is a lot better now.
Dave