DST files are a special format used to instruct embroidery machines. They are only really written by software specialized to the purpose as there is a lot of other information you need to enter to produce a file (stitch density, understitching, stitch pattern, etc.) It requires someone fairly knowledgeable in the industry to do anything usable. You can find places on the web that will do it for you. Google "embroidery digitizing" and I think that will get you started.