After going through the rigging tutorial, I can rig my model with not much problem. After finish rigging, I started weight painting. Then problem... everything went so slow when I trying to paint. I ask for help from Kah, and he told me that this might be because of the subsurf I used. Each level of subsurf will slow it down 4 times, and i have apply 3 levels to my model... 64 times slower... great... but luckily I have my model before applying subsurf saved, so Kah help me to replace the model with subsurf with the one without subsurf, and ploblem solved!
-- rigging my model
-- weight painting is taking me ages to get the right weight on each bones.