Got a couple of PMs on this so I'll reply here to save others - it'll probably come up in search later on.
Once you've "ripped" (or rather 'copied' since the DVD isn't protected and doesn't need ripping) you will have .m2v and .ac3 files (video and audio respectively).
On the PC I really don't know what packages will import these files. the good people at
http://www.dvdrhelp.com will no doubt know. I hear good stuff about tmpgenc
On the Mac I've got DVD Studio Pro and it imports these files. There are other software packages out there that will work I'm sure. DVD SP is very complex but quite powerful... it's also damn expensive.
Maybe other folks could jump in here with suggestions ?