HummerPartsList.txt is a XML code.

This code can add the entire parts list of the model to a Bricklink Wanted list. 

To install: Select the upload tab of your main bricklink wanted list. Then copy and paste the XML code into the field. Then follow the on-screen instructions

For further instructions see the Bricklink instructions at: http://www.bricklink.com/help.asp?helpID=207