Download Senuti from here.
Double click the downloaded dmg (ie senuti_0.50.1.dmg) to mount it.
Drag the Senuti icon onto the Applications shortcut icon directory below to install the Application.
Double click the Senuti icon in the Applications folder to launch the program.
You will be displayed a welcome message. Click the Continue button.
Press the Continue button again to accept the license.
You will be prompted to select a Copy Location for your iPods music. In this example we will copy to a specific directory. Select iTunes Music Folder from the dropdown menu. Then check the box next to Automatically add songs to iTunes. Finally click the Continue button.
At this point you will prompted to setup your iPod for use with Senuti. First, hold down the Command+Option keys while plugging in your iPod. This will prevent iTunes from syncing with it.
Once iTunes has detected your iPod, check the box titled Enable disk use.
You will be warned that this requires manual ejection of the iPod. Click the Ok button.
Now click the Apple button at the bottom right hand corner.
Your iPod is now ready for Senuti. Go back to the Senuti install process and click the Continue button.
When display some Senuti tips click the Continue button.
Finally you will be notified that configuration is complete. Click the Done button.
Senuti will now open and display the music on your iPod!
To transfer songs simply select the songs you would like to copy, then select Transfer from the File Menu.
You will notice a small indicator at the bottom left hand corner as your music is copied to your computer.
Once the copy is complete you can view the transfered songs in your iTunes Library.