[Q] can I safely uncheck EBR1, EBR2 in flash tool not to change partition layout? topic

I have Lenovo P780. There are Chinese and RestOfWorld ROMs for this phone, and they are little bit different.

My question is: can I install ROW ROM, repartition it (there are simple patches that work with some ROMs) and later uncheck MBR, EBR1, EBR2 (which of them?) when installing my target Chinese ROM to leave partitions as I set them before?

? How to SAFELY update to KK? Don't want to bork it. topic

I don't want to bork my D950. So I'm asking for help.

LG Flex 4.2.2 D950 AT&T rooted using TowelRoot. And TWRP loaded with older version of Freedom Flex.
Big thanks to mattwheat & PlayfulGod for SAFELY getting me to this point.

I have Titanium Backup Pro & have frozen or uninstalled a bunch of stuff. Should have just frozen not uninstalled, my mistake. I am also on an AT&T MVNO & will not receive KK.

I've read & read & read. So my confusions are:
1. since my stock D950 is missing some apps system & otherwise. If I could get D950 KK it would bork because some JB apps are missing?
2. This is silly I don't understand what a TOT file is. It seems to be LG proprietary. I think it's a stock ROM? Not sure. I've looked.

I've downloaded LGD950AT-01-V20b-310-410-MAR-22-2014+0.tot at 3,065,344 KB from https://docs.google.com/file/d/0B1sK...bkU/edit?pli=1.
Also downloaded
LGD950AT-01-V20b-310-410-MAR-22-2014+0.zip
LGD950_20131202_LGFLASHv160.dll
LGUnitedMobileDriver_S51MAN312AP22_ML_WHQL_Ver_3.1 2.3.exe
VC_RedistInstaller.exe (just in case)

I'm smart but my organizational skills suck.
Would some kind soul explain how to get stock KK on my Flex D950 & retain or gain Root.