Finally!! OpenWRT worked! Thanks a lot for helping out man!
What I did in the end is:
- Use the latest chinese firmware with MiWifiRepair Tool to unbrick the router.
- Use the Windows Tools (The russian ones) to upgrade from version 2 to 3.
- Use the same tool to flash OpenWRT instead of using telnet & downloading the firmware.
It finally booted up and worked. I think I should edit those bat files and add English translations in them and additionally create a new doc with better translations too.
Thanks again.