From Start | Run open a command window. Assuming your environmental variables are set correctly start with the following:
SQL*Plus: Release 10.2.0.1.0 – Production on Tue Aug 26
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Enter user-name: system
Enter password: <enter password >
SQL> Exec DBMS_XDB.SETHTTPPORT(3010); [Assuming you want to have HTTP going to this port]
PL/SQL procedure successfully completed.