Hi Nanda,
I have used the Import wizard mentioned. All you need to do is to create an entry in the tnsnames.ora file, so you can connect to Oracle. Then create an ODBC link to the Oracle database,using the entry and follow the step by step screens of the wizard.
Actually we used the SQL Server Import wizard to upload the tables & data from an Access database to an Oracle database we had running. Gotta love that utility!!!!
Cal