40x to 48X for real?

I heard that someone mentioned that I could flash my LTR-40125S to LTR-48246S or LTR-48125W using one of the DOS firmware and MTKFLASH utility. However, I went onto liteon website, but there were NO Dos firmware to download. Where can I download a DOS firmware (*.bin) for LTR-48246S or LTR-48125W ??? Also, does it matters as to which one of the 48X ( LTR-48246S or LTR-48125W ) I should flashed to?

Thanks

Yes it’s true. You have to get the firmware from someone who has the drive, download it from someone, or extract it from the exe flasher using litefirm (no I don’t know where it is). And you want the 5 version.