NylonPool.com

Copied from here the address below. Hope this helps.
http://www.mydigitallife.info/2008/03/19/how-to-add-etrade-investment-br...

First set up a U.S Paypal account.
To add E*Trade account as a bank account in Paypal, follow these steps:

1. Login to Paypal account.
2. Go to Profile page.
3. Click on Bank Accounts under “Financial Information” section.
4. Click on Add button.
5. Select United States in the “Country” drop down list.
6. Enter ETRADE Clearing as the “Bank Name”.
7. Select “Account Type” as Checking by clicking on the radio button.
8. Enter 056073573 as the “Routing Number”.
9. Then enter and re-enter your eight-digit E*TRADE Securities account number in the 2 “Account Number” fields.

Also see: Use E*Trade Securities Brokerage Account for Paypal 3 Times