Heh, I forgot I even made that script. Sorry if it didn't work or anything, I think it's one of the first scripts I ever made, good to see someone making use of it.
Personally, I prefer the third panorama background. It seems to work well with the logo, for some reason, and doesn't make the tree stand out as much as a brighter or (more) coloured background (i.e. the first and second).
One thing I would say, is that the silhouette seems to have more than one colour in it, perhaps editting it to make it just plain black might improve it. (You can do this in Paint, by saving it as a monochrome bitmap, but there's probably way easier ways in whatever graphical program you are using).