Thanks all of you!
I've been trying to change the wallpaper in the wanderer app but it doesn't seem to assume the one i choose. It does not apply it and a reboot does nothing for it as well. I'm doing it by opening the wanderer applet, then going to Appearance tab and clicking on Workbench button. I select another image, one of the defaults, then wanderer seems to assume it inside the applet, even after reboot, but the desktop always remains the same.
What i am doing wrong?
thank you.
PS: Ok, i got it, had to change GUI mode from magellan to wanderer... Things can get confusing pretty quickly on this one.