It's totally working now. I have removed gtk-related libs under /usr/lib and cf is still bootable.
Here is the complete gtk lib package. Put the "local" dir in /usr. Copy local/etc/pango and local/etc/gtk-2.0 to /etc, overwrite the original. It's all.
Thanx hansel, jharker, and Antartica. Your knowledge helps me.
Added:
In the package, local/bin and some dir in local/share/locale might be unneeded.
Added 2:
The following files in /usr/lib is safe to remove.
Code:
glib-2.0
gtk-2.0
pango
libatk-1.0.so.0
libatk-1.0.so.0.1011.0
libgdk_pixbuf-2.0.so.0
libgdk_pixbuf-2.0.so.0.600.7
libgdk_pixbuf_xlib-2.0.so.0
libgdk_pixbuf_xlib-2.0.so.0.600.7
libgdk-x11-2.0.so.0
libgdk-x11-2.0.so.0.600.7
libglib-2.0.so.0
libglib-2.0.so.0.600.6
libgmodule-2.0.so.0
libgmodule-2.0.so.0.600.6
libgobject-2.0.so.0
libgobject-2.0.so.0.600.6
libgthread-2.0.so.0
libgthread-2.0.so.0.600.6
libgtk-x11-2.0.so.0
libgtk-x11-2.0.so.0.600.7
libpango-1.0.so.0
libpango-1.0.so.0.800.1
libpangoft2-1.0.so.0
libpangoft2-1.0.so.0.800.1
libpangox-1.0.so.0
libpangox-1.0.so.0.800.1
libpangoxft-1.0.so.0
libpangoxft-1.0.so.0.800.1