So I've recently rooted my phone and tried a ROM or two. I find it really handy that you can use TWRP recovery to install another ROM from the SD card, you don't need to have it connected to a PC.
However, on my device (HTC One S) I need to flash a different boot.img file for every ROM as well, so I still need to hook my phone up to my PC to switch ROMs. If I don't do this, it just gets stuck on the loading screen. Then I must use the command
fastboot flash boot boot.img
from the folder where boot.img is located.
Is it possible to flash this boot image with TWRP or any other way without using fastboot over USB?