Jailbreak your phone.

I just edited my iPhone's 'hosts' file successfully (on Jailbroken iOS 6.0).

Installed OpenSSH onto iPhone via Cydia
Using a SFTP client like FileZilla on my computer, I connected to my iPhone
Address: [use your phone's IP address or hostname, eg. simophone.local]
Username: root
Password: alpine
Located the /etc/hosts file

Edited the hosts file in a decent text editor (such as Notepad++).
Added: moparts.org 127.0.0.1
Uploaded the changes, overwriting the hosts file on the iPhone

The phone does cache some webpages and DNS queries, so a reboot or clearing the cache may help. Hope that helps.

Now the battery works like new and only needs charged twice a month. Try it, you'll like it.