Here are some photos and details about the last release played on a PAL Wii in a PAL CRT TV with RGB.
With the original ioQuake3-Wii.dool you get proper aspect ratio when displayed at 16:9, at least ingame. But, as I said in a previous message, the UI is cut a little at top and bottom. Resizing the screen didn't help as it only affects the playable area.
This would be the preferable way to play.
With the 264p build the UI now fits correctly on the screen, but the aspect ratio is totally wrong. Menus have text and backgrounds streched down horizontally. Loading screens have icons streched down vertically compared to the original build (but I think it's ok since it matches the UI extra vertical resolution). Ingame is like part of the original image is cropped at the top and the bottom, then streched vertically to fit the screen. Resizing the screen didn't help as it only affects the playable area. Also, because of the lower resolution, the settings text is hardly readable. Maybe with the right horizontal size it would be better, but I guess they where design with 480 vertical lines in mind and little can be done.
Since this is an experimental build maybe is not worthy taking a look and fix it.
In the 240p build all is red tinted, probably because is displaying a NTSC video signal via PAL RGB and mixes the colour information. Like in the 264p build, the aspect ratio is all wrong. It seems a little bit more of the top and bottom is cropped. The UI is also cut like in the original build.
Since this is an experimental build maybe is not worthy taking a look and fix it.
The Arena builds didn't work for me. This time I don't get a DSI exception screen. I see the vertical columns of noisy coloured pixels and it stays there no matter how long (I waited a couple of minutes). It returns me to the HomeBrew Channel menu after pressing a button on the controller.