I installed Knoppix v6.0.1 on a USB drive, and decided to remove compiz-fusion because of the extra space.. But I managed to remove the windows decorations along with it as well.
Now, after doing a little research, I've realised that to get them back I need either gnome-window-decorator, kde-window-decorator, or gtk-window-decorator. So I guess I'll have to install atleast one of them.. Am I right?

Also, if I am right, which one would you recommend? Are there any better ones? And where would I specify which window decorator my windows manager is using? Knoppix 6 uses LXDE, but I didn't find any option where I could specify the window decorator.