Following article is really helpful.:
http://dyamez.blogspot.com/2008/01/how-to-install-compiz-fusion-ubuntu-710.html
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My graphic card is seemed to be a ATI Radeon x1550.
And Ubuntu 7.10 is installed.

I could install the suitable driver with
System > Adminstrations > Restriced Driver Manager

I installed xserver-xgl and I removed previous compiz*s.
I added 3rd party software repositories into synaptic package manager.
And updated on terminal. When I use a terminal, I should make sure another synaptic is closed so that it doesn't lock the terminal.

I was stuck at
Go to System -> Preferences -> Appearance. And select Visual Effects tab.
even though almost done.

Ubuntu complains "The Composite extension is not available" when I click not-none one.
I'd better restart computer again. There's nothing but I can do each time.

As soon as I restart Ubuntu, It works properly.
More than default compiz with Geforce, I think. Wow. So many functions.
I'm impressed.



 
I needed source code also.
It was available with following manner.

http://www.freedesktop.org/wiki/
freedesktop.org was well organized. I could be used in general purpose.
freedesktop.org is building a base platform for desktop software on Linux and UNIX. The elements of this platform have become the backend for higher-level application-visible APIs such as Qt, GTK+, XUL, VCL, WINE, GNOME, and KDE. The base platform is both software and standards. --> From here, I clicked the software hyperlink.

And, at the bottom, "For a list of third party desktop projects see the list of desktop projects." I clicked the link.
http://www.freedesktop.org/wiki/Desktops --> On here, I found
Compiz: OpenGL-based 3D window manager to extend existing desktop environments like Gnome and KDE
At download, I found the source package.