Uninstall DVD43 ... it is not needed, and can potentially cause problems.
Two things you need .....
DVD Decryptor & Ripit4me, and they can dump the DVD to your HD either as an image file, or as individual files.
DVDshrink wouldn't hurt either, as you can shrink 8.5GB DVD's down to a single layer 4.5GB DVD (with a sacrifice in video quality).
Nero was not necessary, you could have used imgburn which is free, but either will burn the results of DVDshrink onto a DVD for you.