So you want to Install Color OS to your OnePlus One? Unlock bootloader? Install custom recovery or root your OnePlus One? Well here is a toolbox which might help you to do that.
MultiROM is one-of-a-kind multi-boot mod for Oneplus One. It can boot any Android ROM as well as other systems like Ubuntu Touch, once they are ported to that device. Besides booting from device’s internal memory, MultiROM can boot from USB drive connected to the device via OTG cable. Read the Post OnePlus One MultiRom installer