STOP! If you are upgrading from v2 you must install the v4 bootloader first:
http://dangerousprototypes.com/2010/01/18/how-to-bus-pirate-bootloader-v4-upgrade/
v4 BOOTLOADER ONLY!!!
DO NOT TRY TO LOAD THE BOOTLOADER FROM THIS ARCHIVE!!!! 
DO NOT TRY TO LOAD THE V4 FIRMWARE WITH p24QP!!!