Solution : https://service.sap.com/sap/support/notes/305495 (SAP Service marketplace login required)
Key words : 
6c sr1 sr2 windows nt windows 2000 r3up r3setup unix reason, post upgrade procedure                     korean language importif, applying support package / hr support package 7, 6c srx korean                  23/apr/2001 caution, 6c sr1 korean language disc, 6c sr2 korean language disc, support packages / hr-support packages, post installation procedure update tcp0c, start importing korean language data, installation set additional environment variable
Related Notes : 
       
| 420371 | Add. info on upgrading to Basis 4.6C SR2 (NDI upgrade) | 
| 390062 | Additional information about upgrading to 4.6C SR2 | 
| 387745 | Inst.: 4.6C SR2 R/3 Inst. on Windows (general) | 
| 387074 | INST: R/3 4.6C SR2 Installation on UNIX | 
| 329622 | Additions: Upgrading to Basis 4.6C SR1 (NDI upgrade) | 
| 328409 | Inst: 4.6C SR1 R/3 Inst. on Windows NT (general) | 
| 327285 | Additions to upgrade to 4.6C SR1 | 
| 313107 | INST: 4.6C SR1 R/3 Installation on UNIX | 
| 302362 | Generic language import: Termination for DB MSSQL | 
| 208830 | Inst: 4.6C R/3 inst. on Windows NT (general) | 
| 201144 | INST: 4.6C R/3 Installation on UNIX | 
| 195443 | Current note on language import 4.6C | 
| 192949 | Additional info for upgrade to 4.6C | 
| 54059 | Korean Installation Guide | 
| 42305 | RSCPINST (I18N configuration tool) |