Hi all.
Last News: (if someone is curious)
I'v made the setup of iFabio's Chameleon Boot Package.
At reboot system was ok (still no sound card recognized, but that's another story).
So I started with 10.5 system and copyed the LegacyHDA.kext in /E/E.
I went once agin in 10.6 and saw in sys profile that the nvidia card was fully recognized (thanks to last Cham boot and GraphicsEnabler=yes i think

) so i switched to 1680x1050 resolution...and the monitor went azure.
I tryed booting once with -x and once with GraphicsMode=1024x768x32, but noway.
The -x option didn't boot at all. All i had has been a dark grey screen.
With GraphicsMode option, during the boot, the resolution was 1024x768x32 and i saw the green apple screen and the apple in the center, but at sys startup (I think was at that stage) all azure again.
Prolly the
boot options works only during boot!?!?!
Now I think I have to redo all from the beginning...Just to learn better the right way to do it

Or maybe I can just install the SL's disk leaving Cameleon's disk untouched??
EDIT:
I solved all. 885 (889a) LegacyHDA.kext working fine. now i wonna try aggregate device to manage the 5.1
Videocard troubles solved too.
i had in com.apple.Boot.plist 1680x1050, now i'm using
<key>Graphics Mode</key>
<string>1280x1024x32</string>
and all is woring fine. I got my video at 1680x1050.
Wonna thanks you all for your effort and kick me for my noobness!!
Dan
P.S: If I'm so much OT just notice me so i can edit or delete my post.
Once more: Thank you for your help!!