Liver Questions

I am just starting the diet and apparently have a congested liver. I need to be able to get in a good amount of oils, but have read not to do this when the liver is weak. I have been very constipated since starting the diet, despite doing a Colon Cleanse the week before. I am assuming the constipation is because of my liver because I am eating tons of vegetables and drinking lots of water between meals.

So, I want to do a Liver Flush to get things going. I am thinking I will fast for a few days prior to clean out my colon. Does this sound like a good idea? I dont want to release the liver toxins into a constipated system, right? I really want to get my liver in shape so I can start cleansing hardcore. Also, do you guys recommend I take malic acid to soften the stones during the week prior to the flush? I think I will do it next sunday. Thanks alot