How can I override the Device Administrator security policy so that I can disable the lock screen?

On Android 2.2 Froyo, I added my Corporate Exchange Email account to the phone, however, the security policy set by the "Device Administrator" requires that I enter a 4-digit PIN at the lock screen and a maximum 10 seconds idle.

How can I hack my Android, through root access or otherwise, such that I do not need to follow this security policy. I am very annoyed at having to enter the PIN every time I want to use the phone, because I open/close it so often through out the day?

Answer

If you buy the TouchDown app (30 day free trial available), the lock code will not be on the phone, but on the app. That's ever so much better.