I have installed Compiz on Xubuntu 11.10 with

sudo apt-get install compiz compizconfig-settings-manager
compiz --replace ccp &

In the process the XFCE window decoration theme is overridden by that of Compiz (Gtk) which uses the Adwaita theme instead of the Greybird theme. Since Gtk is doing window decoration, I cannot change it back using the XFCE settings.

I just need compiz for scale and window switch and I would like to return window decoration to XFCE (Xfwm4) or to be able to change the Gtk window decoration theme.

How can I do that?

I have found part of the (workaround) answer already:

1. download Greybird Gtk theme
2. install theme (here is where I failed I think)
3. use dconf-editor to change the Gtk theme in org.gnome.desktop.interface

The problem really at stage 2 is where do I place the theme? I tried in ~/.themes/ and then changed the value of gtk-theme in the editor to Greybird. But I saw no change.