Yes, it's a puzzle. There's a spoiler about it in the readme. There's also an encoded message (a separate thing)... I'm not sure if Kain translated that one or not. *nudge nudge*
There's no real code in that message, just random letters...
quick question though: any known incompatibilities? level recommendation? can i bring a companion?
There should be almost no incompatibilities. There's just one npc and a XMarker added in the Mages Guild in Chorrol. Everything else is in its own worldspace.
Level recommendation? Hm... not too low.
So, do I remove Voices.BSA or keep them (readme does not say anything about deleting.)
What is the load order?
No, nothign to delete. Just replace the esp.
Load order? I do not know of any real problems, so just try it anywhere.
Can someone give me a wee hint on how to start the quest?
The readme is your friend.
"Where is the beginning of this adventure?
Keep your eyes open for an exotic visitor in the Mages Guild in Chorrol..."