How to add mm.mysql jdbc driver to tomcat 4?

Hi,
I installed tomcat 4.0.4 full version on my redhat 7.3. I configured it properly and it showed the default page of http://localhost:8080.
I want to install the mm.mysql jdbc driver.
However, I cannot find out where is the Tomcat4 installed?
When I whereis tomcat4, it showed:
/etc/tomcat4
/usr/bin/tomcat4
They are not the folder to include the lib directory for me to put the mm.mysql jdbc driver.
Where is the tomcat4/lib? How can I find it?
Thanks
Andrew

Hi,
I found the tomcat4/lib which is located under /var.
I have the same setting on win2k and the following program runs fine, i.e. jsp can connect to mysql. However, when I used the same file and database, it did not work under linux box. Why and how should I fix it?
Here is the program:
<html>
<head><title>Employee List</title></head>
<body>
<%@ page import="java.sql.*" %>
<table border=1 width="70%">
<tr><th>Last name</th><th>First name</th></tr>
<%
Connection conn = null;
Statement st = null;
ResultSet rs = null;
try {
Class.forName("org.gjt.mm.mysql.Driver").newInstance();
conn=DriverManager.getConnection("jdbc:mysql://localhost/employees");
st = conn.createStatement();
rs = st.executeQuery("select * from employees");
while(rs.next()) {
%>
<tr><td><%= rs.getString("lname_txt") %></td>
<td><%= rs.getString("fname_txt") %></td></tr>
<% } %>
</table>
<%
} catch (Exception ex) {
ex.printStackTrace();
%>
</table>
Ooops, somthing bad happened:
<%
} finally {
if (rs != null) rs.close();
if (st != null) st.close();
if (conn != null) conn.close();
}
%>
</body>
</html>

** employees is the name of the database.

Sorry, the way that I installed the mm.mysql is correct. What's wrong is the conn in the jsp file:
conn=DriverManager.getConnection("jdbc:mysql://localhost/employees", "user", "pwd");
Thanks for help
Andrew