I do understand what you want to do as when I had a PW6 (the 480 panny panel) I used my Lumagen to scale pal to 480 but keeping the 50Hz framerate. However the image was actually better at 576p and letting the panny downscale. In fact 864 was the best I got on the pw6 with Pal and 720p with ntsc, 720p was better than 480p.
So I would not worry too much as you are probably getting a better image giving it 576p anyway.
The G98 is not a scaler as such, it does scale obviously, but it just kicks out some pretty standard sdtv, edtv and hdtv resolutions. A decent scaler must let you change every aspect including front porch, back porch and sync width so you can get it 1:1 mapped, so even if it did let you scale pal to 480 your panel scaler would still kick in without being able to adjust the other stuff anyway.
I tried one after my 598 but ended up with a 500mkII transport for redbook, and an sdi modded Philips 963sa into a Crystalio as I wasn't prepared to compromise on the picture quality and the handful of DVD-A discs I have did not outweigh staying with an M DVD player.
[This message has been edited by gIzzE (edited 04-27-2005).]