adding to a rig after weighting
 

hey, i'm in the middle of painting the weighting for my mesh, but wanted to add a few more bones in for 2ndary action (flapping coat tails).

can i change the rig and reuse my old weighting?

if anyone has any other recommendations for animating "flapping bits" like collars etc. gimme a shout.

this is supposed to be a game model, so not sure about using deformers...

thanks