Solved with a dsdt fix search and apply: dsdt dual data link for wxga+
now everything on my d630 including x3100 with all properities (QE/CI, sleep, wake-up) at 1440x900... just mirroring doesn't work but i don't need it...
used universal snow leopard 3.6 and not done a fresh install.. i used my old installation with nvidia graphics.. just removed natit and used provided kexts from distro

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Asus M3A with ATI SB600/ATI RD770
AMD Athlon X2 6000+
Asus nVidia 8800 GT
2gB DDR2 800MHz RAM
Samsung 400GB SATA
Western Digital Caviar Black 1TB SATA
Philips 1640 DVD writer
iAtkos v7ia
Voodoo Kernel 9.5

Dell D630:
Intel [email protected]
3GB DDR2 667MHz
Intel GMAX3100 144MB
1440x900
Universal OSX Snow Leopard 3.6
DSDT(everything works with vanilla)