Creating a DVD compilation from other DVDs

[PeteRooney]

This probably seems like a daft question, but here goes.
I want to know what the "best" solution is to creating new DVDs based on content from multiple other DVDs.
For example, say I have three live concerts on DVDs and I want to create a compilation on a brand new DVD with some tracks from each.
I'd be happy if any of you could offer me some advice as to the best way to go (and preferably using freeware!)
I'm familiar with DVDShrink, DVD Decrypter, DVDx and RipIt4Me, so don't be worried to talk technical (well, not TOO technical!)
Is there a way of ripping straight from the source DVHs to HDD using VOBs etc in their native format. I think I know how to rip to AVI, then burn the AVIs to DVD, but won't I lose some quality that way in the compression process?
Thanks in advance for your advice!

[Baldrick]

dvd shrink in reauthoring mode, https://www.videohelp.com/guides.php?guideid=502&howtoselect=6;30#502

[PeteRooney]

Thank you - perhaps I just haven't looked at Shrink closely enough!