Hi Spyros. To change the way realplayer looks you have to change the player's skins. To do this right click on RealPlayer and choose 'Show Package Contents'. In RealPlayer/Resources/Contents/Resources, find 'growBoxDown.png', 'growBoxUp.png' and 'playerWindowBackground.png' and change them to whatever shape, color or texture you like with an image editing application like Photoshop. I just made a brushed metal theme and if want to try it out you can find it
here. I am also thinking of making an aqua theme and maybe some color variations. Let me know if you have any particular ideas in mind that you think might look cool with real player.
Powerbook G4 17" Mac OS X (10.4.5)