Hi Donyc,
This Might help out your requriment.
document.getElementById("customerid").setAttribute("defaulttype", "2");
Xrm.Page.getControl("customerid").setDefaultView("a2d479c5-53e3-4c69-addd-802327e67a0d");
The first line sets the default entity type to Contact for the Customer Lookup dialog. Try to search for the USER default type value from MSDN.
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.
Follow this link:
http://bingsoft.wordpress.com/2011/01/13/default-customer-lookup-to-contact-in-crm-2011/
Prudveen D If the answer helped you, remember to mark it as answer.