dahua firmware upgrade

I was wondering if it is possible to switch my Amcrest IP2M-866W PTZ to Dahua Firmware. I was searching around & found a Dahua camera that is identical with the version also being the same. How would I go about upgrading if this file is correct? Current Version on Amcrest IP2M-866W...

v4.001.0000003.2 for NVR5208/16/32-8P/16P-4KS2/4KS2E, NVR5416/32-16P-4KS2 /4KS2E,NVR5816/32-16P-4KS2/4KS2E also can be found at https://dahuawiki.com/images/Files/Firmware/DH_NVR5XXX-4KS2_MultiLang_V4.001.0000003.2.R.201010.bin

hi after update firmware damage language Dahua NVR How to fix problem ??? NVR Model : DHI-NVR4232 firmware use : DH_NVR4xxx_Eng_P_V3.202.0000.1.R.20170221.bin my NVR in original language ? europe - English language my NVR in original language ? Chinese (PLEASE HELP ME)

Hello to everyone. I've really poured over this forum to understand things and it's been a terrific experience. Thanks to all you pros who contributed so much to helping noobs like me! I read the Cliff Notes and Nayr's primers (all fabulous resources). I have a simple question about these cheap...