Hello, this version of Rayman Forever will be perfect if it doesn't miss soundtracks and cinematics.
I found a solution for soundtracks, using this program:
- rayman-tpls-tsr --> https://github.com/PluMGMK/rayman-tpls-tsr
This program do much than restore PC missing soudtracks, it gives to Rayman Forever same soundtracks than console versions.
But for the cinematics, I didn't find a solution, not yet.

auto-answer:

replace cinematics files from my Rayman Forever install:
CONCLU.DAT
INTRO.DAT
by the ones from my Rayman 1 CD EU 1.12 and now I have cinematics.

it works only with rayman-tpls-tsr, or game crashes before to start cinematics.

Nota: rayman-tpls-tsr is not compatible with other chapters like "Rayman Designer" or "Rayman and his fans".