To follow this tutorial you will need to have jailbroken your iPhone and installed OpenSSH.
Lets begin…
Step One
Locate a sound clip you would like to use as your SMS alert tone and drag it into your iTunes Music Library.
Step Two
Select Preferences from the iTunes Menu.
Step Three
Click the Import Settings button in the General Preferences Tab.
Step Four
Choose Import Using AIFF Encoder from the Import Settings popup window.
Step Five
Close the Preference windows and then Control+Click on the sound file you just added to iTunes. SelectCreate AIFF Version from the contextual menu.
Step Six
Notice a duplicate copy of your tone will appear in the iTunes Music Library. Drag this duplicate to your desktop.
Step Seven
The iPhone has slots for six incoming sms tones. They are named sms-received1.caf through sms-received6.caf. Select the file you just created on the desktop and rename it to one of these six possible filenames. For example, my tone was siren.aif and I renamed it to sms-received6.caf so it would occupy the sixth slot.
You may be asked to confirm the extension change. Click the use .caf button.
Step Eight
Launch Fugu from your applications folder.
Step Nine
When Fugu opens you will be asked for the information required to SSH into your iPhone. In the Connect To field enter your iPhone’s IP Address. Input root as the Username then click the Connect button. If you do not know your iPhone’s IP Address you can find it using these instructions.
Step Ten
When prompted for a password, input the password you set for OpenSSH. If you haven’t set your own password then alpine is the default. Click the Authenticate button to continue.
Step Eleven
Click the Go To… icon on your toolbar.
Step Twelve
Input /System/Library/Audio/UISounds/ into the Go To field, make sure Remotely is selected, then click the Gobutton.
Step Thirteen
Locate the sms-received file you would like to replace in the right window pane. In this example I want to replace sms-received6.caf with my own sound file.
Right click or control+click the existing file and select Rename from its contextual menu.
Rename the file to something like this: sms-received6.caf.bak.
Step Fourteen
Navigate to the desktop using the left window pane and locate the .caf file we just created. Drag this file from the left pane into the right to copy it to your iPhone.
Step Fifteen
Now reboot your iPhone to let the changes take effect then launch Settings from the Springboard.
Step Sixteen
Press to select Sounds from the Settings menu.
Step Seventeen
Select New Text Message from the Sounds menu.
Step Eighteen
Now you can select your customized SMS alert tone from the list. Notice the names haven’t changed. The top selection is actually sms-received1.caf and the bottom is sms-received6.caf. So if you copied over a new sms-received6.caf you would select Electronic from the list.
