The files on your DVD are MPEG-2 files, just with some... interesting features. Firstly, each file is broken up into several smaller, 1 Gig file(s), e.g. VTS_01_1.VOB, VTS_01_2.VOB, etc. This was done as a compatibility thing for certain file systems (FAT I think) but it makes it a headache to view the files off DVD.
Fortunately, there are software players that will automatically access the files in sequence, as needed. The two that spring to mind are Media Player Classic and BSPlayer. These can be found via Google and are also included in most versions of the K-lite Codec Pack, which I highly recommend anyway.
Once you have one of these players, simply copy all the VTS_XX_etc files to your computer. Make sure to get the VOB and IFO files. To play them, simply open the IFO file with MPC or BSP.
If you want to make all the files into one single file... that's a bit trickier. I would suggest you go to doom9.org and start taking a look at their DVD conversion guides. You can convert them to a format like XVID, etc at maximum quality -- which is perfect quality, literally -- and save a lot of disk space.
Also, I'm curious as to why you encode everything at 8Mbps Constant Bit Rate. DVDs support Variable Bit Rate video, so there's no reason not to use it. If you can, get a program like TMPGEnc (Full Version). TMPGEnc has a setting called "Constant Quality" for video encoding. If you set it to 100 you will have perfect quality video with the minimum amount of space used.