Only tip: use a working
tftp server
.
The one you found was on the Hikvision site so try that first. I didn't find that one but instead tried a few free/shareware ones that I regret spending the time on... they did not work for me.
I eventually found this one via a thread in another camera forum:
http://hikvision.msk.ru/download/Firmware/update_firmware_IP.zip
I can't comment on the security of the source so use at your own risk.
And I found this video:
make sure your PC's IP is 192.0.0.128.
Firewall turned off.
davinci.dav file in the same folder as the tftp server executable.
And leave the dvr plugged in and powered on for 5 - 10 minutes after the tftp server says the file transfer is complete.
And pray.
The steps with your tftp server may be different.