To configure a persistent CLASSPATH under Windows XP:

1. Click the Start Button
2. Select the Control Panel
3. Click Switch to Classic View
4. Click the System button
5. Select the Advanced tab
6. Click the Environment Variables button
7. Click the New button to create a CLASSPATH or the Edit button to edit an existing CLASSPATH
8. Enter CLASSPATH as the variable name
9. Enter the list of directories or jar files in your CLASSPATH as the variable value, using a semicolon to separate entries in your list
10. Click OK
11. Click OK
12. Click OK