The other way is to edit the /stoneware/webserv/web-inf/web.xml.
Change the <jsp-file>/apps/selfService/changePassword</jsp-file> under the <servlet-name>changePassword<servlet-name> section to point to your custom password change page.
One way to do this is to create a jsp page with a meta refresh that takes them to the custom change password page.
Point the web.xml to this new jsp page, which will then redirect to your change password URL
Remember to backup your custom changes before installing any future updates.