Hello guys.
So, I'll try to help you out a bit since Adamski is not around apparently... Problem is: I forgot lots of things.
M1ckey: I don't remember where the Ra keys are, but they're definitely all in the big tree...
Paul, CS: About the mushroom family (families) in the rainbow mines parts:
there's nothing to do with them I think. I finished the game and got 100% of the secrets without doing anything with them.
The rest is for CS:
the pad to press behind a grate door in the dragon shrine:
you won't solve this in the dragon shrine, it's more of a dream palace secret. It's the Bateson quest, and is not required to finish the game. I don't remember how all of this works, but it starts at the upper library... Did you open it?
Near the fires (not sure that's your question):
there's a fake wall there, next to the second fire. Reach it in your astral form.
The "be quick and smart": it might be where the second statue is, but I'm not sure...
I don't remember exactly how you have to solve this, I think you have to quickly switch between astral and physical forms
Maybe the second statue is also to be reached from the
room with many pillars, next to where you ended Quilp miserable life. Keep an eye on your map in that room: there are teleports aiming at misguiding you
I did kill all the monsters in sleepy hollow. Quite a hard fight, but possible once your team gets powerful enough( I thinks your team should be strong enough, Chaos Shaman).
Prepare yourself for the fight (Vi potions, fire bombs and ice stones), move as soon as you can in one of the corridors behind the doors that are still opened so all the enemies come from the same direction. When the enemies in front of you are weak ones (wolves for example, don't kill them too fast, use them to block the stronger enemies so you can take the time to heal yourself and prepare some new spells.
Again, this is not required to finish the game
I might be able to help you if you send me your savegame (since in mine, everything is solved already).