This BIOS is locked for modification and there is no other method for the mod flashing (except of to use the SPI hardware programmer)
My device (Z51-70) is not listed there, any idea which tool/utility to use? Regarding marker, I assume you mean Lenovo[LENOVO-CB-01-SLIC]2.1.BIN)?
In case someone else wants to do it. Using bios 2.02 and the files for (Lenovo G470,G570,G770,Y570,G560,G550,G780,G450,Z500,Y580,Y480,Y500,G580,G480,Z560,G500,Y510,Z510,Y410,Y550,B550 (and maybe G430,G530,G460) from this thread: https://forums.mydigitallife.net/threads/slp-marker-file-update-utilities.9055/page-15#post-478696 worked just fine. Thanks again Serg008