Solution : https://service.sap.com/sap/support/notes/905634 (SAP Service marketplace login required)
Key words : 
prerequisites sap publishes general platform support data, note require sql server enterprise edition, sap fully supports 470x110 systems, solution supported sap products based, minimum sap_basis support package level, support package level equal, supported sap products based, 40 product windows platforms bw 3, sql server standard edition, existing sap / sql server 2000 database
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| 924288 | Installation of 6.x based SAP Systems on MS SQL Server 2005 | 
| 899111 | Installing R3 4.7SR1 (47X110) on x64 Windows Platform | 
| 814834 | Windows 2003 SP1 x86_64 Support for SAP releases | 
| 799058 | Setting Up Microsoft SQL Server 2005 | 
| 600027 | Installing the Corrected MS SQL Server Collation | 
| 62988 | Service Packs for Microsoft SQL Server |