Hi Toshiki,
Please download the "SAP_NETWEAVER_74.zip" attached file from SAP note 1603103, follow the instructions in this note, and then you will get NW 7.4 product definition for your MOpz.
Also use SAP note 1935993 if you need the product definistions for latest EHPs of ERP, CRM, SRM and so on.
Regards,
Hung