Ok, first of all thank you so much for all your help, and sorry for taking so long to get back to you, been either too busy or tired to get to this...
So yeah, I wasn't sure if the fungus horn was anything, but thanks to the gun, and your help... and I could not seem to lift the horns lids, and I face-palmed when I realized it was as simple as "open". D'oh!
Down inside the beast, did you ever find the stash of gems in the left passage? The one before you collect the hormones?
Then it took me forever before I broke down and had another look at your message to figure out how to open the wall to the symbol button/antidote room... I never would have figured to only push 3 of the buttons before pushing enter...
So now I have been trying to find new objectives to complete, and the latest one I found was the machine near the Fairy Queen's place, the guy there says it needs a fan-belt, and I remembered that there was one on the island's shipwreck... so I mannage to make my way there, especially now that I know how to escape, but now I keep getting stuck/sidetracked with the random jump gates, and wandering/fooling around... so any idea if what I'm trying to do is productive, or is this a dead-end?
The old guy in the trailer still tells me to go-away, I haven't found a way up the cliff-face, turned the fairy queen back to normal, ect... In fact I had only found a whole lot of nuthin', except bits and pieces, and getting stuck plenty.