A couple of questions here:
I added the thickbox.js file to libraby > scripts.
I am not sure which file to edit to call this script. I assumed it was header.php - I am clearly not grasping a crucial Thematic concept here.
Also, after uploading the script and navigating to appearance > editor. Wordpress tells me that I have no themes installed, however the theme still appears to be working.
Thanks, Malcolm