In some instances, the actual code page in effect for a SQL Server 6.x installation will differ from the code page recorded in the master database. The SQL Server Upgrade Wizard requires a scripting code page, which is used to create the upgrade scripts. The default scripting code page is the code page recorded in the master database. If you know that the actual code page is different from the recorded code page, select the actual code page in the list. Most users only need to accept the default code page.
If you choose a scripting code page other than the default, it is recommended that you do not upgrade replication settings. If the server is involved in replication, reconfigure the replication settings after the upgrade is complete.