Allright guys, i came back with a little update
1) I resoldered BT link connection and it gave nothing, i still cant reflash my bios with any metods which you suggested (EvoX / XBlast)
2) When i tried setup a new large HDD via OGXbox Installer console just stuck on the copying files (screenshot below) but AID did the job done
(I don't know why OGX refused to copy files and is a little upset because overall I liked it)
3) And the most important point - i replaced stock 40 wire IDE with a 80 wire and as a result everything worked as it should even with a preflashed bios (but i'm not sure it was only about the cable or resolder BT link connection)
Thank you all very much for your help! I learned a lot of new things
"Hug you warmly"