Thanks again for the detailed explanations.
EDIT: original label would be "Silverfall" :P And patches v1.11 and v1.12 are only for the french version.
BTW: I have only one question: if the contents of DVD2 is to be copied into the installation folder (as the installer would copy itself whatever it finds into the Data\Paks to the installation folder without any error messages on missing files), why not put as many files into that Data\Paks folder as it would fit on a DVD5 dis? Such as those 4 .pak files and some from the Design\Mission subfolder. That way one would end up at least with a full disk and not with 2 disks with 2/3 full.
Anyway, there's something strange with the game: upon loading it.. it just waits or does something for 20-30 seconds during the loading screen (the one with the busty character), then it moves on. Anyone happened the same ?
And no, it's not the hardware.