The IMM and curve brush is very powerful inside ZBrush but I always missed a brush that could draw chains or necklaces. So I decided to make my own. It goes without saying that you should know your way around ZBrush to use it. You can find a guide on IMM brushes here.
I've reworked the brushes to behave better in ZBrush when using the curve brush and I've added UV's. When using the beads the UV islands can be very overwhelming without a good starting point.