title: how to harvest all files in one folder with wix
body: <p>I have the following requirement: I wish to harvest all files in one folder to my install packet, but the files in that folder may increase or decrease, how can i do it automatically? and if i have two file sources, i wish file in source 2 auto-overwrite file in source 1 with same file name, how can i do this?
  thanks!</p>