Here’s a trainer I built from scratch for Final Fantasy VII using the memory.dll library file, and this is also included in the Cheat Trainer Manager program. This works for the newest build of Final Fantasy VII for Steam as of 12/28/15.
1) Character slot HP, MP, Limit and Time modifiers
2) 99 quantity of all inventory items
3) 99999 Gil
4) Increase all character max HP to 9999