How to Back-up and transfer your iPhone or iPod Touch apps
In this tutorial, we learn how to back up and transfer your iPhone or iPod touch apps. First, right click on the desktop and create a new folder, make the name of this "backup apps". Next, go into your iTunes account and go to the applications. Click on the app that you want to copy, then click "delete". Remove the item, then click "move to recycle bin". Now, go to your recycle bin and drag your application from the recycle bin into the "backup apps" folder. After you are on the computer you want to transfer to, to get the app back on your iTunes open up your folder, then transfer it to your recycle bin, and back into your iTunes folder!