Help adding graphics to DSDT

[red_z]

I've successfully installed Snow Leopard on an Inspioron 530 using method from Mat Tiszenkel:http://www.mattisz.com/hacks/snow-leopard-inspiron-530.

Everything is working great, except my video card is an nVidia 9800 GT and its not being recognized. Sys Profiler says its a generic GPU w/ 32MB.

After hours of research, I think my DSDT needs to be modified to include the 9800 GT strings, but I'm not sure how exactly to do this. I did try using OSXTools to modify the plist, but I'm not exactly how the DSDT & Plist work together and thinking that the DSDT might be over-riding the change or something.

I've attached my current DSDT.aml that works perfectly except for Graphics. Can anyone direct me with the best way to adapt? Thanks!
Dave