Okay, in context of the above edits in my previous post, I just dug around, and I found this: http://maemo.org/packages/view/fiasco-flasher/

Is this the package I need to install to be able to run the "fiasco-flasher -k my.u-boot.power41a -f" command? If so, my apologies for thinking that I found some mistake in Matan's instructions. That's just my ignorance causing me to completely miss a part of what was necessary.

Also, Lunat, thanks for clarifying that. (Admittedly, when I said I didn't understand the technical nature of it, I meant at a more technical level than that - namely, I wasn't sure what about ext2 uboot didn't support. Does it mean until your fix it couldn't load kernels from an ext2 file system? Or just it couldn't be installed on an ext2 file system? Something else entirely? I'm guessing the former, but might as well ask to be sure.)