Could some1 exacly explain to me what should I get, in which way insert to pendrive and how to setup BIOS? Once I tried it, but after 4 -5 failed tries I gave up.
didn't someone make a live linux USB iso designed perfectly for mining?
Regardless, you generally have to use a program like unetbootin to make a bootable USB key.
In the BIOS you need to go to boot devices (under advanced, normally) and set the REMOVABLE DEVICES to be the highest priority. YOu normally press + to move them up, or PgUp.