Nouveau and Compositing?

Hi there,
as of now, rather fresh install and all, I use the nv driver and let xorg/HAL/dbus do all the work, i.e I have no xorg.conf.
I get a nicely working KDE4 environment, no hassle.
I initially tried to use nouveau but that unfortunately does not auto-work, somehow it set's things too "high" for my poor old monitor and I just get a black screen and a "out of range" warning.
So these are kinda two questions: How can I make nouveau work without having an xorg.conf?
Can I get compositing with nouveau?
And sort of as an afterthought: Can I get compositing at all without an xorg.conf?
Thanks in advance.

Alright... I gave in an created an xorg.conf.
Section "Module"
Load "glx"
Load "extmod"
Load "record"
Load "dbe"
Load "dri"
Load "dri2"
EndSection
Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
HorizSync 28-64
VertRefresh 60
EndSection
Section "Device"
### Available Driver options are:-
### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
### <string>: "String", <freq>: "<f> Hz/kHz/MHz"
### [arg]: arg optional
#Option "SWcursor" # [<bool>]
#Option "HWcursor" # [<bool>]
#Option "NoAccel" # [<bool>]
#Option "ShadowFB" # [<bool>]
#Option "VideoKey" # <i>
Identifier "Card0"
Driver "nouveau"
VendorName "nVidia Corporation"
BoardName "G73 [GeForce 7600 GT]"
BusID "PCI:4:0:0"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 1
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 4
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 8
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 15
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 16
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1024x768" "800x600"
EndSubSection
EndSection
I have a working KDE environment and I use nouveau as the Xorg.0.log confirmes.
Now, I read up on Nouveau and composite some and it would appear that the two do not go well together. I suspect all that fancy-smancy effect stuff KDE (or rather kwin?) can pull off is considered 3D and therefore off-limits for nouveau?

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