My settings are as follows:
Horizontal geometry
Scan rate: 48.581
Active: 1280 pixels, 15.758 µs
Front porch: 32, 0.394
Sync width: 56, 0.689
Back porch: 304, 3.743
Total: 1672, 20.584
Vertical geometry:
Refresh rate 61.031
Active: 768 lines, 15.809 ms
Front porch:2, 0.041
Sync width: 3, 0.062
Back porch: 23, 0.473
Total: 796, 16.385
I initially had problems achieving a proper PC widescreen ratio with this screen. I e-mailed Philips themselves, but they had no answer, so I turned to Powerstrip. When I intially went into the custom settings I set the vertical rate hz to 60 (as specified in the Philips manual), however Powerstrip has altered this slightly. I also manually adjusted the position an size of the screen slightly.
I am not an expert in any of this and much of my knowledge has been gained from scouring the internet, and I am not sure whether these settings will only work with my particular graphics cards (Radeon 9200 in my desktop, Mobility Radeon 9000 in my Dell notebook), but I hope this helps!