I just found ... I had a too big screen resolution: 1920x1080 ... So just drop it and LB2 works perfectly!
By cons the game resolution now something like 640x480 ... and it seemed at the time, we could choose the resolution directly from the menu. But here, we can just change the size of the textures and details ... I had to miss an episode ...
I checked the compatibility tab, it is well on Windows XP SP2 (the other boxes are unchecked). I also configured the Voodoo setup as specified on the screenshoot ...
Arrghhhl, my screen is 35'' and I playing in a tiny window ...
I still cursed.