Check out http://plasmaspider.com/index.php they have lots of talent there with drawings. Guys like Jason Henry and Gary DeWitt hang out there and offer good advice.
Both signtorch (Gary) and Cascade (Jason) files cut nice on the DT and are a good value to start with to get your feet wet with DXF files. You can customize and add text and stuff to them or even combine drawings.
Did you get the we-cim/cuttingshop software?