Ursie, literally you type (but using [ ] instead of { } - if I used [ ] you wouldn't see what I was doing):
{URL=http://www.lcficmbs.com/ubb/ultimatebb.php?ubb=reply;f=5;t=000348}Part 1{/URL}
It will look like this:
Part 1 The URL you need to include, of course, is the URL which shows on the page where your story part is.
Wendy