Video extraction on a Directivo running 2.5

[Arasirsul]

I've got a Hughes GXCEB0T (same as a Philips 6000, as I understand) 
Directivo running the Tivo 2.5 software. I would like to get to where 
I can extract video from it-- ideally via a TurboNet adapter or the 
like, but I'm willing to pull the disk out of the Directivo unit if 
that's what's required, but I would prefer a solution where I can 
leave everything plugged in.

Has anyone here done this (specifically with a TurboNet board and a 
Philips or Hughes Directivo)? I am, unfortunately, a complete 
neophyte to hacking tivos; I've done what reading I can find but most 
of it seems to be aimed at non-DirectTV Tivos. My understanding is 
this:

1) I need a bash prompt from my tivo via the serial port. Everything 
I've read about how to do this requires either the 2.0 software or 
the 2.5 Extreme, which I'd prefer not to go to. Is there a way to get 
a bash session from the unit with normal version 2.5 software? 

2) I need the Tivonet (or, in my case, Turbonet so I don't have to 
take a hacksaw to the Tivo) card and the driver installed. This 
shouldn't be tough once I've got a bash prompt and I've been able to 
set things up so adding files doesn't crash the tivo. 

3) I need ExtractStream (or, more appropriately, one of its 
derivatives, it looks like ExtractStream in its canonical sense 
doesn't understand Directivos) installed on the Tivo.

4) I need a client program on the PC end (I can do Windows or Linux, 
so I have a few options here.) to talk to Extractstream, and then I 
need something like TMPGenc to graft the streams back together.

Do I basically have the steps down correctly? Any hints on any of 
these steps? Has anyone got a link to a howto on the first part? It 
seems that my big trouble is that I'm using a Directivo-- there's 
lots of info out there for standalone units, but not as much for 
Directivos. 

Thanks in advance!

J.D. Forinash