Change the default Icons OS X 10.4.11 Tiger So, I really would like to change my icon set on my iBook G4, but I really have no clue how to do it!

I have the icons (I believe all are in either .png or .ico), but I have little/no experience on Macs! I know I can go program by program and change icons by clicking on Get Info after right-clicking, but changing the entire icon set via that would take forever and I would be sure to miss some.

Basically, does anyone know of OS X Tiger compatible software that will swap icons out for me?
You should look at CandyBar software from the Icon Factory.

It supports 10.2!!! and later and does exactly what you ask. Free trial to be sure it does what you wish so you don't need to spend any money if it's not to your taste.

http://iconfactory.com/software/candybar