Solution : https://service.sap.com/sap/support/notes/374983 (SAP Service marketplace login required)
Key words : 
0 enterprise buyer windows nt unix japanese japankorean korea traditional chinese taiwan simplified chinese china serverfrontend middleware reason, simplified chinese traditional chinse japanese korean korean version, 0c installation/upgrade asia frontend, windows localized versionin general, simplified chinese, traditional chinese, windows localized version, japanese version 173453 additional info, asian double-byte environments, 0 sr1 asian language versions
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| 366744 | Collective note BBPCRM Upgrade to 2.0C | 
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| 359674 | ITS for Enterprise Buyer professional edition 2.0 (BBP 2.0C) | 
| 338763 | Enterprise Buyer 2.0/SAP CRM 2.0C Inst. Overview |