Solution : https://service.sap.com/sap/support/notes/401836 (SAP Service marketplace login required)
Key words : 
additional key words oracle sql server 2000 migration runtimes, [exitr3copy_nt_ind]class=cexitstepmsgid=ri_gist_exitr3copy_ind_ind add, basis support packages prior, basis support packages, form                     < number>=exitr3copy_nt_ind, migration key- installation, /3 setup template dbmig, message displayed relates, windows 2000 datacenter installed, sql server database
Related Notes : 
       
| 377430 | SQL4SAP and SAP Installation CDs for SQL Server 2000 | 
| 353654 | |
| 327494 | Configuration Parameters for SQL Server 2000 | 
| 321356 | INST: 3.1I SR1 SAP R/3 - Heterogeneous System Copy | 
| 316353 | INST: 4.6D SAP Basis - Heterogeneous System Copy | 
| 209596 | Setting up Microsoft SQL Server 2000 | 
| 179150 | INST: 4.6B R/3 Inst. - Heterogeneous System Copy | 
| 143059 | INST: 4.5B R/3 Inst. - Heterogeneous System Copy | 
| 139945 | SAP Database Monitor for MS SQL Server | 
| 105551 | Migration R/3 MSSQL Server -> R/3 Oracle, APQD | 
| 104593 | Migration R/3, MSSQL Server -> R/3 Oracle, ATAB | 
| 101216 | INST: 3.1I R/3 Inst. - Heterogeneous System Copy | 
| 86860 | INST: 4.0A/B R/3 Inst. - Heterogeneous System Copy |