Not usually. Passpack's Disposable Logins are Password/Packing Key pairs that can not be used separately. If you use OpenID (or other Third Party Login*) for authentication, then you do not have aPassword and Passpack can not make a Password/Packing Key combination for you.
* Includes OpenID, Google, Yahoo, Hotmail, Facebook, FriendFeed, Twitter and Yubikey.
An Alternative Solution
If you would like to be able to access your account with a Disposable Login, you must first set up a standard Passpack User ID and Password. You can do this under Settings > Set User ID and Settings > Set Password from inside your account.
You can then use either your OpenID or your standard User ID and Password to login. You have both options available to you. You may also then set up your Disposable Logins under Settings > Disposable Logins.