Unless you panel is native 576 then how can you give the screen native with Pal, you cant.
The PW6 is 864x480 so you cannot give it native rate and bypass the internal scaler with any Meridian product.

You need a scaler that can scale to 864x480 and get all the timings right, once you get the screen pixel mapped (using a decent pattern from a DVD) it will become perfectly obvious, but there is no way to do it with a G98.
The G98 looks better outputting progressive than interlaced as it has a much better de interlacer than the panny plasma, but it can't get passed the internal panny scaler which is why you add a scaler in the first place.

No Darling, I've had it months!