I hope the Soma would work. What chronic pain do you experience? If it is that bad, and is tied in with the insomnia, maybe an opiate is something you should consider. Of course opiates + benzos = very dangerous, but it might help with your sleep by helping with your pain. I don't know if that is very good advice, but chronic pain management could really help with your sleep. You say that you think opiates might be the answer. They themselves could help with sleep, but also could worsen insomnia. If pain or discomfort is keeping you up, they might help. They are very good for conditions like RLS. It sounds like GABAergics aren't doing much for you, even barbiturates, so maybe. Just remember that opiates are incredibly addictive, and very dangerous in combination with other CNS depressants (benzos, barbs, alcohol etc.). I am sure you know this, but in the name of harm reduction, I feel I ought to put it in there.