Hi,
Simply use Ticonnect (official tool for windows) or Tilp (community tool for windows, Linux and Mac) and connect you calculator using the silverlink (if you don't have it buy it online).
If you"re using a regular TI83, be sure to download file with .83p extension (some other are allowed for other kind of vars).
If you"re using TI83 plus or TI84 plus, you can download file with .8xp, 8xk extensions (some other are allowed for other kind of vars).
You can download programs here or on the major community website ticalc.org
Hope it helps.
