All you need to do is issue the orders, usually relayed through the new sponsor once you've set up your account there. You can transfer all the funds in your IRA or only a portion. And you can make as many moves as you want. While this method is the easiest, it's not necessarily the fastest. The new sponsor you are switching to should be willing and able to offer tips on how to expedite the move.
Sponsors giving up an account are sometimes less than swift.
How to do it Open an account with the new sponsor you've selected. You needn't deposit any money right away. Instead, you'll fill out a form with instructions to the old sponsor for transferring your funds to the new account. Unfortunately, things don't always run smoothly. Some transfers take weeks or, in the most horrific cases, months.