I've read the "rooting and warranties" thread in the Hero root forum, and the longer thread linked from there. My understanding is that to run a custom ROM requires two steps: rooting the device and unlocking the bootloader. Further to that my understanding is that the unlocked bootloader tells the manufacturer, and carrier, that you've voided your warranty. If I have no intention of running a custom ROM and simply want to run an app that needs root access, for example a wifi tether app, can I just do the rooting part and install the app? Leaving me with a still locked bootloader and thus retaining my warranty?