You can find out more at:
Minna No Nihongo 2 Cds X4 Minna No Nihongo 2 Series: Amazon.co.uk: Aots: Books
These are the links to the Minna No Nihongo series II audio files.
CD1:
http://rapidshare.com/files/151672724/MNNII_D1.rar
CD2:
http://rapidshare.com/files/151674183/MNNII_D2.rar
CD3:
http://rapidshare.com/files/151675572/MNNII_D3.rar
CD4:
http://rapidshare.com/files/151677133/MNNII_D4.rar
The password is:
minnaupgrade