from Keith Strickland
Go to one of your name fields and in the properties select the "Type Ahead" entry. Check the "Enable Type Ahead" check box. Add the proper separators and click the blue diamond next to Suggestions and pick "Compute Value". In the resulting javascript editor put the following code and click OK:
var dbname = new Array(@Subset(@DbName(), 1),"names.nsf");
return @DbColumn(dbname,"($VIMPeopleAndGroups)",2);