first play it in VLC, discover which title is the main title: 

now open Sensible cinema in create mode

click "open ripped version of DVD unedited", right click, create new file, name it something.txt, right click, "open", and then select it.

it will rip that fella to the hard drive (for the save to filename, use the default).  
It will take quite awhile, but will get everything set up for quick editing after that.

In the meantime, make your file look like this:

https://github.com/rdp/sensible-cinema/blob/master/zamples/edit_decision_lists/example_edit_decision_list.txt

After it finishes ripping it, it will start you watching it in mplayer, which should give you a reasonable view of good timestamps.

Add timestamps to your file as necessary, then (exit smplayer and) click "Preview edited section of current DVD" (use the default filename always),
give it a range "around" the edit you just added, then it will give you an .avi file with just that segment.
Watch it (in VLC or smplayer), and see if your edit worked.  If it didn't, edit it, hit "re-run most recent preview"
If it did, then click "Open ripped version of DVD" again, and continue playing from where you were before.

When you're done finally, then click "Create edited copy of DVD on your hard drive".
It will re-rip and do it all (will take forever), but will give you your final product.
Alternatively, you could get a final product by clicking "Preview edited section of current DVD" and putting in a start timestamp of
00:00 and an end timestamp of 9999 or what not.  Same deal, but will take you less time.

Also after you're done, you can delete any left over files that are still there.

Also after you're done, you can submit it back to the project by emailing me with an attachment: rogerdpack@gmail.com

Also if you want sensible-cinema to be able to auto-choose your EDL, then include its unique id (click the "Get a disk's unique id" button).

A few pointers:
 You can just watch the DVD (using any DVD player), and get timestamps that way, before starting this.
 You can watch the DVD using VLC Player, which has a "fast forward" button, just recognize that VLC's timestamps are slightly off,
  so they'll only be approximate, but it might still help.