Not sure of any tutorials right off but I haven't tried looking either. You want to make your path and then do the attach brush to path option, then tweak the paint options to make them grow in sequence.
Supermicro X5DA8, Dual Xeon 3.0 GHz
Windows XP Pro, SP1
VelocityQ, Version 9.1.41, Quattrus 140
VelocityX, Version 1.0.01
Kansas City, Kansas - United States