i shouldd be able to flash it siply connecting to the usb and then execute avrdude.exe
I don't know that is correct, it implies that the u2 has a ROM-based bootloader and I don't think it does. I always thought you had to use ISP to program it.
I admit the article seems to say you can.
I found the avrdude files with a quick search under Vista, I would think 7 has a search facility?
for the conf file, I too cannot find that exact HEX file though but there are a lot of them in the bootloaders folder.