OK, let me answer a few things:
1. Like a couple of you figured out, trying to flash PR1.1 doesn't work. At all. If you are having trouble, you have to flash PR1.2(which seems to reset the kernel to the default), THEN immediately flash your RootFS image. Once you do that, you open the keyboard, unplug the USB cable, and boot into BackupMenu, from which you restore the OptFS.

2. To reinstall titan's kernel, you simply have to gain root, then do "apt-get install --reinstall kernel-power kernel-power-flasher", like others figured out.

3. As Dana was talking about, I thought for most of this topic that the Kernel was installed in the RootFS. Now, I'm not so sure, because when you flash PR1.2, then your RootFS image, you are back to the default kernel. This is because either A, the kernel is stored somewhere else, or B, the boot link to the kernel is stored elsewhere(whatever tells it which kernel to use). If you know which it is, let me know.

-Rob