I tried Dark_falcao's Animated Battler's script on a fresh project and it worked fine, and I actually really like the script. Unfortunatly as you begin to customise your project it seemed the script gave many problems. So across my browsing I found a Japanese web site with a similar script made by Minto. I translated it to get a better understanding of the script, and so far it seems to work fine on a few heavy custom projects, I havnt tried Side battle systems yet, but seems to work fine with the front view style battlers
http://shadowsworkshop.yuku.com/topic/21/Minto-s-Breathing-Battlers-Script-ver-1-02