There are a number of critical updates available for the CRM 2011 RC Server, Email Router and Outlook Client and if you haven’t accepted to have these downloaded automatically via Windows Update then you can download them from here manually. The KB Article can be found here.
The first line sets the default entity type to Contact for the Customer Lookup dialog.
The second line sets the Customer Lookup dialog’s view to the ‘Contacts Lookup View’ using its guid value. If you do not use this line of code it will default to the ‘My Active Contacts View’ or whatever you have selected as the default Contact view.