My point was that the name of the file is tivotools.tar, not tivotool.tar
Regarding the cp command - Linux documentation says -r should work, but clearly it doesn't in this version.
Some more notes;
The gzip command to unpack the kernel from the PTV cd fails because it tries to unzip into the CD. You need to copy the kernel to a writeable place first. (There is probably a way to unzip to an alternate location, but it doesn't jump out at me from the documentation.)
The instructions to create the rc.sysinit.author should tell you to cd to /tivo/etc/rc.d - otherwise you are creating the file in the ramdisk copy of Linux you're running.
Also, Riley, the correct path for the image on the Instant Cake CD is /cdrom/.images/000001 For those who may do an ls and not see the .images folder, the leading dot makes it invisible. (I know just enough Linux to be dangerous, so apologies if this seems obvious to some.)