SOLVED:
I,m sharing files and method to add slic 2.1 into bios of thinkpad x250. (LENOVOTP-N10)
Step 1: make bootable usb using DOS98.
https://www.mediafire.com/file/220tpwdlnqlsbty/Make Bootable USB using DOS.rar/file
Screenshots are attached.
https://www.mediafire.com/file/0j6xkqa3y...1.bmp/file
https://www.mediafire.com/file/nyc1apffc...2.bmp/file
Step2: copy all the files from x-250.maker folder into usb.
https://www.mediafire.com/file/vrsvkfzo6...r.rar/file
Screenshot
https://www.mediafire.com/file/8ny4iy4m8...3.bmp/file
Step3: restart your computer and entering into boot menue by pressing f12 button.
Step4: select your usb and press enter.
Step5: you will be booted to dos98 system
now type mark.bat and press enter
step6: success , now you have slic 2.1 into your bios.
@dr.muhammad waseem