is there any way to flash all this image, but keep the internal storage intact?
i mean, without wiping /data/media/ partition
i have no problem with backup all my files into PC,
but when i put all those files back to phone, the date modified is f*cked up, you know, MTP sucks.
so i'm avoiding internal memory wiping if that's possible.
(1) flash all images in the zip file EXCEPT userdata, although last time I tried this, my OPO refused to boot up, so I had to resort to flashing everything and wiping my device. Good thing I had everything backed up on my PC. So before trying anything, even if restoring from PC is just for emergency, make sure to back up anyway.
(2) download calkulin's rooted stock zip and it should flash like any custom ROM but will give you the stock 44s. You can even flash superSU and use that if you do not want to use the built-in superuser, just like I do.
Hope this helps.