For any FF7 information that you could ever need, want, or use just visit
CavesofNarshe.com ;hai ;hai ;hai ;woo please just look at this site.
It has literally everything and I think Zeromus will back me up on that. (I think hes a member there?)
Also, good backup sources are
Gamefaqs.com
and
FFcompedium.com
You can find every little fact on Materias, items, weapons, armors, accesories, enimies, locations, and easy ways to beat bosses. + all the secrets and hellpfull things like the code to get huge materia in rocket town or using an x-potion on the Gi ghost kills it.