thank you all.
i did my first dvd rip and burn using dvd shrink and dvd encryptor. i played around with all the settings, read tutorials etc etc, and then cut out the stuff i didnt want and adjusted the compression.
i decided i wanted to keep all extras so i just cut out audio and subtitles.
being my first burn i wanted see how much of a difference compression would make. the actual movie itself was burnt at 62.5% compression. i guess thats not too bad bcos when i tested it against the original i couldnt tell the difference. however, the only time i saw poorer quality was at the main menu, the video and fluidity appeared a bit boxy at times, but only shortly.
i might burn it again to see if i can improve the results - just for fun...haha
one thing tho - once deep analysis is done in dvd shrink does it then store that dvd's info somewhere, bcos now whenever i insert the original dvd, dvd shrink will know and display its details...?
thanks guys for your help