Please note that this is still in beta form and you use it at your own risk!.

Instructions:
Open Spybot in advanced mode. Select 'Mode' from the top menu and then select 'Advanced'.
Click on 'Settings' and look for the 'Web Update' section.
Place a check in the 'Display available beta versions' box and select the 'Update' icon.
Select the update for the Spybot S&D 1.4.2b
Download the selected updates.