In the developer kit ther is a folder called Command Plugins - can I use any of them as is?

In the DayLite to DirectMail folder there is a file: DayliteToDirectMailCommand.m and on line #64 there is the following:

NSDictionary *attribs = [NSDictionary dictionaryWithObjectsAndKeys:@"firstname", @"First Name", @"lastname", @"Last Name", @"defaultElectronicAddress.url", @"Email Address", nil];

can I simply add the fields I need to this line???