I've been using
this guide for the Super Famicom version; the two versions are close enough that I've been able to make it about halfway through so far. As for menus, here are the ones I've figured out and needed so far:
'select' menu -
____
| 1 |
| 2 |
|
3 |
1 - talk amongst characters
2 - map
3 - save
'button II' menu -
___________
| 1 2 3 |
|
4 5 6 |
1 - equip items
2 - describe items
submenu 1 - weapons/armor
submenu 2 - useable items (potions, etc.)
submenu 3 - story related items
3 - character order
submenu 1 - character list on left hand side of menus
submenu 2 - battle formation
4 - use items - pick character and item first, then:
submenu 1 - use item, then pick who to use it on
submenu 2 - give item, then pick who to give it to
submenu 3 - drop item
5 - character status
6 - save/load
submenu 1 - save
submenu 2 - load
submenu 3 -

submenu 4 -

I'm not sure which one's which for the other options, so I'll check 'em out tonight and get back to ya.