Copy an already ripped&burnt movie to another dvd

[zanax61]

Is there any possibility to copy an already ripped&burnt movie to another blank dvd?That's my problem and I need your help.Well,using dvd decrypter and dvdshrink to make the audio and video TS files after I had saved on hard disk,I made a playable copy of a movie.For example ''Harry Potter 1''.A friend of mine asked me a copy for his own use.Unfortunately I had erased the dvd files from hard disk.So I decided to make this copy using nero 6.3.0.2.I tried the on the fly method but the message is:''not enough space on dvd.Try with a a bigger one''??????.The dvd in the burner was 4.7GB and a new one blank.I tried with 3 different brands of media(tdk traxdata and ritek),but the same result.Then I thought to copy it by making an image first through nero.The procedure started normally,but between 75%&80% always the same message. ''Failed prosess'' and then freezing.
I removed nero and after a format of the hard disk I installed windows xp sp2 and nero first.I made a copy on the fly,but when i tried to make another one,the same again.After removing nero again,I istalled easy cd creator media 7.Some times I make copies and sometimes don't.Can anybody help and tell me why does this happen?
Thank you.Sorry for my english and if I make you tired.
Configuration of the system:
windows xp sp2,P4 2.8,Ram ddr 512mb,hard disk 120gb,dvdrom teac,dvd writer teac 8x4.
dvd decrypter the last version,and dvdshrink 3.2.I also tried the versions before.:confused:

[oddyseus]

U can't offer a back up of your dvd to a friend. It is completly illegal. It isn't very wise to mention it on a public forum also.

Pls suggest to your friend to go out and buy its own copy of Harry Potter, or invite him to your house to watch it together.

Other than that and for educational purposes only, I will remind you that dvd decrypter is capable of ripping a dvd to iso image and burn it afterwards in a blank. If the original is a dvd5, ie smaller than 4.38gb, u don't have to mess around with shrink too, decrypter can do all the job on its own.