You can't really extract the slices after they've been imported into MFS. If the Otclient log file hasn't been overwritten on your stock drive yet you can get the URLs to download the slices directly from Tivo's servers from it though. The problem there is that the swsystem slice is encrypted & you need to decrypt it on the Tivo you downloaded it to (which has to be hacked). The process isn't extremely complicated but it's too involved for me to describe here. (I posted details about the process here.)
But they're already in MFS on your hacked drive anyway - all you need to do is start an emergency reinstall. You can do that via the kickstart method (described here) or by telnetting into the Tivo and running:
That said, I don't think any of this will solve your immediate problem. Random (and not-so-random) reboots aren't typically solved by reinstalling the Tivo software unless you did something to royally screw up the software in the first place. In your case, I'm betting it's the SP's that keep getting downloaded from Tivo's server. (I also had an issue with reboots being caused by a USB network dongle on one of my S2s. But since the HD has a built-in NIC and there's no need to use back-ported drivers for it, you probably won't run into that particular problem either.)
tivosh /tvbin/installSw.itcl 11.0k-01-2-652
Last edited by psxboy; 11-30-2011 at 02:30 PM.
Reason: additional information