hi,
1) archive contains bootload.hex (oh yes, it is not the source file exactly but... :)
2) source code is the subject of change. If you have bought demoboard then you have CD with all the sources include bootloader. If you have not it then:
2.1) ask Atmel directly for it - it is not secret materuals, they give you a link where it may be downloaded from;
2.2) ask somebody who has archive (my demoboard is for CC01 so it can not help you)

Regards,
Oleg