I'm also having mounting problems for disc two, but it doesn't appear my antivirus (NOD32) is causing any conflicts, as I tried to temporarily disable it, and it'll still give me errors.
Do I HAVE to change my settings to Japanese, or can I run under locale? I really don't want to turn my backslash into a Yen symbol, and destroy most of musics metadata...
Edit: Installed fine after changing locale, but I can't play after changing it back, which is a shame, as '\' changes to a Yen symbol, which is a deal-breaker for me.