I am very new to Mac's (about a week

). I got CandyBar and have been changing my icons and have seen references for iContainer. I logged onto places like IconFactory and they have links to buy it but very little information on what it is and how it works. Can someone please explain what it is and how I use it. From what I gather it helps change all icons at one time and if that is right, where do you get the icons?
Also, CandyBar only helps change System, Application and Volumes. Is there any way to change just the run of the mill folders that are all over the hard drive?
Thanks in advance for the help.
Lee