I have installed Kalyway 10.5.2 on my Toshiba Tecra A7-243 laptop, which has a Ati x1600 mobilty, and everything is working fine except dual display..
I have my internal display working at native resolution including Quartz Extreme, after entering my EDID in the ATIinject kext from here, as somehow I've had no luck with the ATIinject kexts from this post.
The only thing I can't get working is dual display. My laptop has a regular vga connection and not a DVI and if I connect my second display (NEC 2080ux), I just get a blurry clone from my internal display.

I have entered the EDID of my second display in the DFP1 strings from TheMaxx32000's ATIinject, but as mentioned I had no luck at all with that one, even with my internal display.

I also noticed that the display preferences only shows one display, so this made me wonder if I have to create some strings in the info.plist?
And if that's so does anyone know which strings have to be created for dual display?