EDITED, should work now...
Text Forwarding and Mass/Group Texting is now available on the iPhone!
1.
EDIT: Go to Installer, push Sources, then Edit, then Add, then type in app.weiphone.com/installer, then Done, then Refresh.
2. Go to the Install tab on the bottom then the folder "WeiPhone" and find and install "weToolUS" (Version 0.3.6.2 beta or later, depending on when you read this guide).
It's pretty user friendly, just use the "+" button to add as many contacts as you wish
