You should only edit your entry and add something like "There's one fic in the comments so far - if you have more, I'd love to hear about them :D" to your original text (please see the other entries if you need "inspiration" ;D)
How to edit your post: http://www.livejournal.com/support/faqbrowse.bml?faqid=2
Re: mod
How to edit your post: http://www.livejournal.com/support/faqbrowse.bml?faqid=2
Re: mod