I'll answer myself here,
I opened the 'Help' (and i use that term loosely) file in Toast 8 Titanium, and looked at their instructions for converting.
Basically, drag in the file, select Video in left panel, the DVD under that in same panel, highlight file(s) you want to convert, then click Export button at bottom of Toast window.
This brings up a dialog that offers options for conversion. Probelm is the things that the 'Help' file says it should offer, and the actual formats offered are completely different.
Basically it only offers the formats for Portable media (iPod, iPhone, PSP) in 320 x 240 aspect ratio. So, even for a Tivo (non-HD) file, it is a downgrade.
If anyone figures out a better method, let me know.
Thanks,
Brian