I’ve been using Grooveshark a lot lately, and now that I’ve finally made the switch and bought a Mac, I can use tons of cool little apps such as Fluid, a Site Specific Browser (SSB) which transforms any site into its own application. I did this with Grooveshark (as explained here) and now Firefox can crash, and at least I’ll have some music to keep me company while it relaunches.
The only problem was, the default icon was kinda ugly, since the app simply took the tiny favicon and stuck in on my dock all pixelated. That’s why I decided to do my own icon. I’m not the first one to get the idea, so you can check other icons out and see which one you like best !

Here’s mine, 512*512 px, png format:

Just right click and “save as…”

To modify your app’s icon, you can use a program such as Candybar, which is free to try. Just import the image (File > Import > Image) and select it. You then drag and drop your app from the Finder into the “quick drop” area, and you’re done ! Be sure to remove the icon from the dock and relaunch the app to see your new icon.