Steh, yes, the olive oil and lemon juice mixture is separate from the Epsom Salts , they are taken separately. I use 1/2 c. lemon juice, 1/2 c. olive oil and mix them together, the taste isn't bad (to me).
I've never taken anything to sleep... that's personal preference, I suppose.
The Epsom Salts will open the bile ducts for the stones to pass. The reason they recommend apple juice is that it softens the stones, but I've never taken it. Check the FAQ's on the Liver Flush Forum , I think you can take malic acid and do the same thing, but please check.
If you do the Epsom Salts as recommended, the chances of a stone getting stuck are slim, but I would definitely do the massager to help them move, just make sure you lie down immediately after taking the evoo/lemon juice mixture and have the massager there, ready.