how do i make backups of my dvds

[lollyruk]

hi can anyone give me a helping hand i only have a few dvds and wanna know how to make backup cds of them as there badly scratched allready because of people using them all the time?

i have a cd writer and cd rom if i copy from one cd to the other or is do you have to compress the files or something in order to do it cause i aint got a clue ???????????????? anyone help me please