Did you install the Compiz configuration panel as mentioned in your other thread? It has controls to enable and tweak dozens of Compiz features, one of which is the cube.
Fedora is another distribution. Specifically it's the free testing side of Red Hat Enterprise Linux. If you've got Ubuntu installed and working it'd probably be easier to stick with it. You can do pretty much the same things on both. Check out some of the screenshots and see if you like the look.
EDIT: Beryl has been merged with its former competitor, Compiz. Together they form Compiz Fusion which is installed by default in Ubuntu 7.10.
i using the intel 945 driver, i using it on a intergrated graphics card and i think its the 945 cuase i type some wierrd code on terminal and it gave me all this stuff and said vga controll intel 945
chi@chi-desktop:~$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03)
chi@chi-desktop:~$ compiz
Checking for Xgl: not present.
Detected PCI ID for VGA: 00:02.0 0300: 8086:27a2 (rev 03) (prog-if 00 [VGA])
Checking for texture_from_pixmap: not present.
Trying again with indirect rendering:
Checking for texture_from_pixmap: present.
Checking for non power of two support: present.
Checking for Composite extension: present.
Comparing resolution (1280x1024) to maximum 3D texture size (2048): Passed.
Checking for nVidia: not present.
Checking for FBConfig: present.
Checking for Xgl: not present.
Starting gtk-window-decorator
/usr/bin/compiz.real (video) - Warn: No 8 bit GLX pixmap format, disabling YV12 image format
I CANT FIND THE CONTROL PANEL!!! maybe i didn;t choose to install it? what can i do?