This is the lamest description ever, so I apologize for the vagueness.
I saw this movie pre 1999.
The only scenes I really remember is:
A.) A girl died, and some of her clothes and belongings were locked in an old trunk in the back of a school (?). If I remember correctly, some kids at school were maybe working on a play or something and found the trunk and opened it.
B.) I remember the dead girl or her spirit haunting the town, or the people who opened the trunk. I remember one scene where a white rocking horse was rocking back and forth on its own.
Thats all I remember. 😦😖
Hello Mary Lou: Prom Night II
1987. http://www.imdb.com/title/tt0093176/?ref_=nv_sr_1
your description was neither lame nor vague.