I haven't looked at the prereqs for the rom of which you speak but since its an LP rom, I'm not surprised you're confused because there may be different devs who are building LP roms in different ways right now. We are caught between Loki and Bump. So if its not booting, it may require a bump'd TWRP with kk bootloader, etc. If you rooted and used Autorec to get your recovery, it downgrades aboot to JB, and flashes a non bump'd twrp. So you'll have to closely read the requirements for the rom and set yourself up accordingly. If you have any questions on that let me know and provide a link to the rom at that time as well so we can read the same material.
Something completely confusing just happened.
I had backed up from twrp recovery, the working v1.2 Grola Rom before the brick. I tried to recover it, and before i have installed the kk bootloader it asks, but know it shows the same menu that it showed when it was bricked and it says boot certification verify lg g2 among others, for a few seconds, and then the screen remains slightly bright. I cant access recovery but i can access download mode.
Should i do the same for when the phone was bricked with the 3 images?
I am seriously lost now about anything that has to do with root.
Sorry again and thanks

Edit: Also when i connect it to the pc, it opens a bunch of windows asking me to format it for every drive letter not in use.
