I'm with you. I came to learn -- and no I don't mean be spoon fed. I have access to TV thru my hacked T-60 so I'm not looking for a quick fix to free TV. In fact, I gave up another perfectly hackable unit for my HDVR2 because I wanted to face the challenge and learn how the box works, what the commands are, and how it all fits together.
Believe me, I've read MrB's post on the initrd replacement at least 10 times. Even his post on hacking the box is now dated since you can't use the U5 version forever unless you never hook up to the stream. I spent most of this weekend reading here and at the tivo underground trying to understand this stuff. That said, I did notice a recent post here that in a few short paragraphs explained in 5 mins or less almost everything I'd learned about hacking this unit in over 80 hrs of reading.
My impression is there are a few true masters here, like MrB and Kraven, and then there's a bunch of other people like me who are stumbling around who want to learn more but need some basic understanding of linux and the commands (and yes, I've read the faq). I even bought and installed SuSe linux on one of my computers in the hope it would help. It didn't.
Like anything with computers, hands on experience helps. It took me literally hours to figure out how to find my rc.sysinit file let alone mod it.