1. How to set "www.debian.org" as your default homepage through an anonymizer

    Internet Explorer: Tools / Internet Options / General / Home Page
    Set to http://anon.free.anonymizer.com/http://www.debian.org/

    Mozilla/Netscape: Edit / Preferences / Navigator
    Set to http://anon.free.anonymizer.com/http://www.debian.org/

2. How to make an anonymizer (e.g. anonymizer.com) be a proxy server

    Internet Explorer: Tools / Internet Options / Connections / LAN Settings / Proxy Server
    Set to www.anonymizer.com, port 8080

    Mozilla/Netscape: Edit / Preferences / Advanced / Proxies / Manual proxy configuration
    Set to www.anonymizer.com, port 8080

Of course you can change "www.anonymizer.com" to your preferred anonymizer server.