I can't find, what I was looking for but as C-moi said, we used the plugin lyricshow by Hero.Hua ( I know that we hosted this file, but I can't find it and I don't know if it will work with foobar 0.9...) this solution will only work with foobar2000 as audioplayer. with this plugin, you can configure a lot of things like fonts, colors etc...
then when your configuration is done you can fix the lyric windows by using the plugin xmovewindow.
the second way that we used was with minilyrics, and we fixed the minilyric window using xmovewindow ...
later