name='GoggleboxUK']Firstly Use DVDShrink but click the Reauthor button rather than the BackItUp. In the window on the right you'll see all the disc contents listed. Grab everything apart from the menus and drag it to the window on the left. Click BackItUp and select a folder on your hard drive to burn it to rather than disc.
You'll be left with VTS files listed as VTS 1, VTS 2 etc. Each of these is a separate segment (chapter) from your original DVD. These can now be renamed to suit before dropping them into your authoring software and creating your new, more professional looking, DVD.
I'm not sure what you mean by uncompressing VOB as VOB files don't compress they merely reduce the quality settings to fit more video footage on a single layer disc *DVDShrink does this) but if you'd like to make the file size of each segment better you could use MainConcept H.264 encoder which will allow you to change the format, pixel depth, aapect ratio and encodong format (PAL/NTSC) to suit your needs.
If I've missed anything, or if you need further help, just let me know and i'll be happy to help.