I highly doubt that Bilboard can be the reason for a reboot loop. What is "quicktweak option F2"? Try this for each of the apps listed above in isolation:

• Reflash
• Install the app
• Reboot (with charger disconnected so it really reboots)

If you can't find the culprit using this method, start with one app, and install a second one, always reflashing at the beginning and rebooting after each installation. If you can't reproduce it at all after a reflash, even with all apps installed, chances are that the reboot loop was not caused by these apps.

Given that nobody else has reported a reboot loop before, I assume that it was just bad luck or a combination of factors independent of either of these apps. If you can reproduce the reboot loop by reflashing and simply installing all apps, without doing any other tweaks, please let me know.

I'm not saying that it is impossible, but rather that I find it very unlikely and have made sure that Billboard is as safe as possible (really, if it really dies for some reason, you just won't get an updated billboard screen, and ideally even the old operator logo is removed). Just don't say "It causes a reboot loop" until you have verified that after a clean reflash and reinstalls, it is caused by the apps and not by some tweaking that was maybe done several weeks ago.

Again, if you can reproduce this reboot loop, let me know how and I'll investigate.