So, there is no way to change Irinlia path ? and if I already took Lace out of prision I can't see the scene ? (The quest is done already but I could never get the scene)
No, I don't think you can change either Lace or Irinlia paths, and as far as I know, this scene requires both of them. Though, the scene should still be unlocked in the CG room if you've finished their good paths.
EDIT: yeah I checked my save, with the good path for both, the bad path scenes are unlocked in the CG room.