How to change icons on a mac dock?

I have a mac with a dock of course, and I want to change the icons. I used to have object dock for a HP computer, and it was easy to change the icons on that, but on the mac, I find it very difficult. I can't seem to change it with any PNG files, although many of the downloadable icons are .png files.

help! Thanks!How to change icons on a mac dock?
You can change the icons on your Dock if you want different looking ones from the defualt ones.



Find the folder, or the Application that you want to change the icon for. Click on the folder/application and press Command-i to bring up the information window for the folder/application. At the top left of the information window a small version of the icon will be shown.



Now, click on the Icon that you want to use for the folder/application and press Command-i to bring up the infomation window for the icon file. You will be able to click on the small icon in the Information window for the icon file and then press Command-C to copy the Icon image. Now go to the Information window for the folder/Application you want to change and click on the icon image in the Information window and press Command-V (paste) to paste the new icon in place.