This sounds very frustrating! Can you take one of the older antipsychotic meds? I know many people who find them effective and have stayed on them in spite of all the newer meds coming out. Do mood stabilizers help? What does your current psychiatrist recommend?
I would suggest asking your psychiatrist about other options. For example, some people find Tegretol helpful as a mood stabilizer. Also, there are lots of other older anti-psychotics aside from Navane. As far as medications go, I'm not sure what else to suggest. My guess is that, over the next couple of years, there will be even newer antipsychotic meds that come out that aren't as taxing on the liver as the current ones and you might be able to tolerate these, but that doesn't really help you right now.
Does talk therapy feel useful to you?