Try this tutorial.
http://www.techparaiso.com/windows-m...-taskbar-icons
Or the creedo not-so-condensed version:
Get this:
http://www.techparaiso.com/members/m...askbarTools.7z
Grab the dll out of your windows folder and onto the PC. In my case it's CDMA_RSSI_PPC.dll . Make a backup copy in case something happens.
Drag'n'drop the dll onto (unsigner.exe) to unsign it so you can edit it. Then open it in resource hacker. Do Actions/Save all Resources, you'll have a bunch of bitmaps. Edit them in photoshop until you have changed them to what you want. Careful to keep them the same size. Then go back to resource hacker, right click each icon resource in the tree on the left (click the green cog thing) and choose replace resource. Replace them one-by-one with the customized bitmaps you edited in photoshop.
Save, extract msigntools.7z into its own folder, double click signer.exe and choose your dll. It'll be signed again.
Copy the dll to your storage card and then move it to windows, overwriting the old dll. Not sure if you need soft reset. That should do it ^^