Create a 11g Database manually

Used DBCA generated scripts (custom) to manually create a 11gr2 database on Windows. The scripts:CreateDB.sql
CreateDBFiles.sql
CreateDBCatalog.sql
JServer.sql
context.sql
xdb_protocol.sql
ordinst.sql
interMedia.sql
emRepository.sql

apex.sql
netExtensions.sql
lockAccount.sql

postDBCreation.sql

We'd like to skip apex.sql. Is there any issues by doing that? Could we also skip netExtension too?

tks.