Squeeze.GNOME. Correct compiz configuration.

[Mark Goldshtein <mark.goldshtein@gmail.com>]

Hello, list!

Please, help to install and configure compiz manager correctly for
Debian Squeeze.
Googling got me some recommendations, kinda:

1. Open a terminal and type sudo su
2. Type gedit /etc/X11/xorg.conf

3. Add the following option under Section "ServerLayout"

Option "AIGLX" "true"

4. Add the following options under Section "Device"

Option "AllowGLXWithComposite" "true"
Option "RenderAccel" "true"

5. Add the following options under Section "Screen"

Option "XAANoOffscreenPixmaps"
Option "AddARGBGLXVisuals" "true"

6. Add the following lines to the end of the file

Section "Extensions"

Option "Composite" "Enable"

EndSection

But the is no such file:

# ls -la /etc/X11/
total 52
drwxr-xr-x  10 root root   496 Nov 17 14:32 .
drwxr-xr-x 124 root root  6272 Nov 17 21:25 ..
drwxr-xr-x   2 root root  1096 Nov 17 14:28 app-defaults
-rw-r--r--   1 root root    15 Nov 17 14:28 default-display-manager
drwxr-xr-x   6 root root   144 Nov 17 14:24 fonts
-rw-r--r--   1 root root 17394 Mar 10  2010 rgb.txt
drwxr-xr-x   2 root root   152 Nov 17 20:16 twm
lrwxrwxrwx   1 root root    13 Nov 17 14:32 X -> /usr/bin/Xorg
drwxr-xr-x   2 root root   104 Nov 17 14:28 xinit
drwxr-xr-x   2 root root    48 Mar 15  2010 xkb
-rwxr-xr-x   1 root root   709 Mar 10  2010 Xreset
drwxr-xr-x   2 root root    72 Nov 17 14:09 Xreset.d
drwxr-xr-x   2 root root    80 Nov 17 14:09 Xresources
-rwxr-xr-x   1 root root  3517 Mar 10  2010 Xsession
drwxr-xr-x   2 root root   552 Nov 17 19:07 Xsession.d
-rw-r--r--   1 root root   265 Mar 10  2010 Xsession.options
-rw-r--r--   1 root root    13 Nov 25  2009 XvMCConfig
-rw-------   1 root root   601 Nov 17 14:09 Xwrapper.config

What is the modern and correct way to accomplish a compiz
implementation into Squeeze?
Hardware:
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon
Mobility M7 LW [Radeon Mobility 7500]
	Subsystem: IBM Device 0527
	Kernel driver in use: radeon
# glxinfo | grep rendering
direct rendering: Yes

And I had have a fully working compiz under Lenny at this hardware.
Worked like a charm.

At the same time ./compiz-check now shows:

$ ./compiz-check

Gathering information about your system...

 Distribution:          Debian GNU/Linux (squeeze/sid)
 Desktop environment:   GNOME
 Graphics chip:         ATI Technologies Inc Radeon Mobility M7 LW
[Radeon Mobility 7500]
 Driver in use:         radeon
 Rendering method:      AIGLX

Checking if it's possible to run Compiz on your system...

 Checking for texture_from_pixmap...               [ OK ]
 Checking for non power of two support...          [ OK ]
 Checking for composite extension...               [ OK ]
 Checking for FBConfig...                          [ OK ]
 Checking for hardware/setup problems...           [FAIL]

There has been (at least) one error detected with your setup:
 Error: Software Rasterizer in use

Would you, please, help me to bring all this to work? At least, point
me to actual document how to get compiz working on Squeeze.
Thank you very much!

-- 
Sincerely Yours'
Mark Goldshtein