Thanks Tygre. Now it's very easy to try another set of icons. In fact I've made another with an aluminium look, from here: http://all-free-download.com/free-ve...et_312267.html
They announce them as free. I've had to make the Reload one though, as it didn't exist. Ah! it looks terrific without RTG too
Aluminium, using 256 colors:
Aluminium 24Bits (RTG):
And I've made another set for only 16 colors. Edit: Both "Aluminium" and "Aluminium for 16 Colors" use images using only 16 colors, but the palette changes. "Aluminium" looks better with more colors.
This is Aluminium for 16 Colors, using 16 colors:
Edit: As Tygre told, to change the images you just have to open his "images" drawer and add for example this new images just as they are. Then start AmiModRadio, click on Preferences, Reset (just in case) and select the set of images you want to use. Close the program and start it again.