With the help of this great
screen aspect compilation - tutorial I found my prefered values for Winuaex in 1080i video resolution.
They are brutaly :> scaled to fit the whole screen - so circles will not be round, but I can live with that because the aspect ratio is scaled proportionally, and finding the correct 4:3 values should not be hard. Important thing is that there are no jagged edges or other scaling artefacts.
For most Games it's:
2497x1404 Games using a higher resolution with overscan tricks or something or just in full pal/ntsc mode require:
2270x1248(Battle Isle is one of those)
screen position in X/Y could differ between tvs, mine were X:-320 Y:-20
All kudos go to Cospefogo for his research in proper scaling. I just did the calc.exe thing. :>