TCExam - UPGRADE
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TCExam 4 has a new database schema and other improvements 
that requires a new installation.

To import your questions and users database from version 3 to 
4, try the following:

1. backup you entire existing database data (this is not 
   necessary for upgrading but it's a good thing to do).

2. Use the phpPgAdmin or phpMyAdmin application to export 
   the following tables from the old database in SQL format:
   
   tce_subjects
   tce_questions
   tce_answers
   tce_users
   
   Note that on tce_users table the user_group_id field has 
   been removed and the user_verifycode field has been 
   introduced. So, when exporting this table exclude the 
   user_group_id field and use complete SQL inserts.
   Users' groups must be created manually from TCExam 
   interface.

3. Install TCExam 4 on a new directory and with a new 
   database name.
   
4. Use the phpPgAdmin or phpMyAdmin application to import 
   the SQL previously saved.
   
5. If you are using the PostgreSQL database please update 
   also the sequences for the imported data.

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