"Tant pis, je changerai de télé un jour ou l'autre."

Ca ne fait jamais de mal. Mais la vraie solution à ton problème, c'est la Matrix Infinity ou la DMS4 EZI Pro.

Extrait de la doc de l'Infinity :

Press TRIANGLE + CIRCLE to enter the configuration menu.

PS2 SCREEN FIX :
OFF : Disables PS2 video fix.
COLOR : Games will be output on their original video mode (PAL/NTSC) with color correction applied to match your PS2 region.
PAL : Force video mode to PAL
NTSC : Force video mode to NTSC
PAL60 : Force all games to NTSC with color correction. Games will run faster but screen might need adjusting.

Y SCREEN FIX :
OFF : Y screen position fix is disabled.
AUTO : Y position fix enabled with default settings. Should be fine for most television sets.
+/- N : Fine tune Y position. Positive values move the screen down, Negative values move it up.