I didn't know that a skin could have its own exectbl file. Some day I'm definitely going to have to read some of the instructions/tutorials. I'll go ahead a make that change real quick so people don't have to go editing their own files.
You're right about the cd in the album art area. I don't ever see it since I have all of the cover art for my music. Feel free the replace it with whatever you find. If you find something good let me know and I'll put it in my version.
I'll take a look at the popup window for volume control. The only draw back to that is that its not accessible from any other screen other than the main menu. But maybe something is better than nothing.
I"m trying to avoid using the pic viewer for backgrounds, in case I decide to implement a pic viewer someday. I thought I was pretty clever with the way I came up with to load previews, but it looks like MGD came up with a very similar solution without using the timer... here.