Sorry for posting like an idiot and wasting your precious time... let me start it all over again...
(1) I am following the official thread of mobileread.com... this is the link...
https://www.mobileread.com/forums/sho...d.php?t=275877
(2) My firmware is 5.8.2...
(3) Used the first two mirrors to download PW2 bins... for eg,
http://eu-asia.mrdcorn.net/factory_PW2_5.4.3.2_initial
(4) Sorry for not verifying the md5 test. I tried searching for the windows software for md5 validation but didnt find any. I guess since i made two attempts to download the bins from two different servers using IDM, that could relieve the odds in my favor.
I guess from my stunted brain that it must have to do something with FW 5.8.2...
PS: I think its much simpler to verify the md5 from Linux. Could you suggest me the terminal command?