it should but, what I did
I would go half way where it ask you to begin installing but didn't. Instead, I would back up the eeprom first and FTP the eeprom.bin to the computer.
Then FTP again and delete the old dash in the C:, and send over the new dash (MSdash 5960) that we have in our files section.
Reboot the xbox, and finally modding it with the new dash installed
but thats just me

its really up to you......