Replay Gain button / improvement on main skin

[HiAmplitude]

Would be great to have a replay gain (rg) button right on the main skin instead of only finding it through preferences->playback->replay gain.
Main feature of the new button (space for it seems available) would be to switch between rg sources track or album: This would make it very comfortable to adapt to the right loudness when playing a whole album or listening randomly thru a versatile playlist.
Further improvement (as a wish for the winamp fairy ) would be if the rg source would be chosen automatically depending whether all tracks in the playlist have the same album tag or not.
Further or alternate function of the rg button could be direct access to preferences->playback->replay gain.
And finally to complete the bunch of ideas: Other users might wish to have more and other buttons on their skin. Probably it would be great to have something like in many other applications (f.e. MS office) to adjust which function buttons should be shown or not. I guess most users still have some empty space between Next Track and Open File(s) button to place their most wanted winamp functions.

Thanks for your consideration