Nothing to boot from! What to do?

Ok, so I was finally able to ROOT my LS980 using IOROOT. I then succeeded in flashing TWRP. So I thought, "Time to pick a ROM". So I went with D3RPs SuperG2 ROM (not the bareback). I saved the .zip to my downloads folder on the internal sdcard. I followed the instructions and wiped everything, and I think that's where everything went wrong. When I went to install the .zip, it wasn't there. That means it got wiped. So I tried going into download mode so I could use FlashTool and go back to all stock. BUT I can't boot into that either. The ONLY thing I can do is boot in TWRP, or sit at a nice bootloop. On top of that I failed to make a backup, so I literally have nothing to boot from... With the LG G2 not having an external sdcard, I'm completely lost.... Any help would be greatly appreciated.

Ok, so I figured it out. Didn't realize I could go into download mode by holding Vol+ while plugging in via USB. I can wipe the sweat from my brow now!