Steps: 

 

1. Visit the "SOFTWARE" page, and download all programs and follow their individual installation guides.  

 

2. Download the .skp file you want.  Each file is labeled and you may look at the individual models before download by looking at the library below.  

 

3.  Once you've downloaded the software, and the .skp file and you're happy with the changes you've made, you are now ready to splice your file using Slic3r.  

 

4.  Use the resulting g-code file in Pronterface to print your part!