I have the same issue, textures.dv2 and 002_textureset.dv2 is reported as corrupted during install (and also dialogs.dv2). I bought the game at GamersGate so the issue has nothing to do with media or drive.
I'm on Windows XP Professional 64-bit Edition, 4GB RAM, big harddisk with plenty of space, drivers are up to date, I really don't know what to do. I even uninstalled my antivirus (Avast) to see if that helped, but no.
