InfiniteMac OSx86 - Short explanation for Graphics Enabler in EFI please?

InfiniteMac OSx86 (http://infinitemac.com/forum.php)

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Short explanation for Graphics Enabler in EFI please?

Next weekend i am going to install 2xSnow Leo...
...and I would like to enable my graphics via PC EFI 10.5.
Have a ZOTAC GTX 260 AMP! And a 9600 GT low profile (for my media PC).

So far so good. I am familiar with installing Snow and PC EFI. But how do i do the settings for graphics enabler? I saw in the Chameleon RC2 Installer that there is an Option "Graphics Enabler". Do I have to choose this Option?
Or is it just Okay to take netkas boot 10.5 EFI File?

How can I switch from pciroot? Do I have to set the values in com.aplle.boot.plist?

Can someone share an example an give me some hints to learn? Would be nice an helpful. Thx a lot!

add this

Code:

        <key>GraphicsEnabler</key>

        <string>yes</string>

and this

Code:

        <key>Kernel Flags</key>

        <string>-pci1</string>

to your boot plist