I'm sorry I can't remember anything more helpful. You might want to try searching on a forum dedicated to Harry Potter fanfiction rather than Sailor Moon & Ranma 1/2.
Here are some Yahoo groups that might be a better choice:
Flourish and Blots
This one is part of a pair, and is primarily for G & PG-13 searches. If in doubt, use the other one.
http://groups.yahoo.com/group/flourish_and_blots/Borgin and Burkes
This one is part of a pair, and allows the more mature rated stories (R & nc-17). The other group is if you want to avoid smut stories.
http://groups.yahoo.com/group/borgin_and_burkes/HPstoryfinders
Looking for the Harry/Draco novel? Or that Snape/Hermione story that made you cry? Or even that Weasley twins one that was really good? Just can't remember where to find it? Post on this list and ask, someone just might know where it is. Gen, het, and slash are allowed. They're all equal as far as anyone should be concerned.
http://groups.yahoo.com/group/hpstoryfinders/(the next is NOT a duplicate, just almost the same name)
HP_Storyfinders
Want to find that story you read, so you can read it again? Looking for a specific type of story? Then this is the list for you! If you can describe it, chances are one or more of the other members can find it if you are ready to offer your help in return by answering requests!
http://groups.yahoo.com/group/HP_Storyfinders/http://groups.yahoo.com/group/HPfind-a-fic/Remember that chaste little kiss that gave you sweet dreams for a week? Or the time Snape confiscated a HP/SS fanfic in class? Or how about that satisfying moment when Lucius finally bottomed? -- if you know it's out there, but you don't know where: HP find-a-fic. For all your fanfiction needs. This is the most efficient Harry Potter fic finder on the net! Help us maintain the excellent service by helping to promote the group!
http://groups.yahoo.com/group/HPfind-a-fic/Harry Potter Recommendations & Links
Hey, are you obsessed with Harry Potter? Do you like fan fiction? Than this is the group for you! Here you can post and discuss anything dealing with Harry Potter. Any fiction or link goes, regardless of type or rating.
http://groups.yahoo.com/group/Harry_Pot ... s_N_Links/HP-RECS
An original group dedicated to making it easier for avid Harry Potter fanfiction readers and writers to give and recieve what's new and old in fantastic hp recommendations. All slash (as we are a slash-oriented group), het and gen is welcomed!
http://groups.yahoo.com/group/hp-recs/P.S. I had this as a semi-canned response for situations like this cropping up on non-HP forums, but it looks like I need to update the information to include the Neo links before they stop working. They should still work however.