Liteon 32123S. Mount Rainier firmware recommendations please

Can anyone advise on flashing my LTR 32123S to enable Mount Rainier. I’m not too worried about speed of burning - error free is more important to me. I have downloaded the Windows flash utility but am unsure which if any firmware to use.

Thanks

I think that the special XSU1 firmware has Mt. Rainier.

Thanks, I’ll try it!