To upload a script, sign in and navigate to your profile, then click "+Add a Script" in the middle of the left side of the page, under the "Scripts" listing. On the screen that comes up, enter all the relevant information—the more you add, the more likely it is that your script will come up in searches. Near the bottom of that page, you will see the "Upload" links for adding a full script, a partial script sample, and a score (if applicable). Click "Save" at the very bottom of the page, and the script should appear on your profile. It will immediately be searchable and accessible to other users.