How do i backup my Rom

[sbatty]

First i would like to say sorry if this has been posted before but i could not find it all i want to do is make a copy off my rom so i can reset it back if i upgrade to a different rom

Thanks

S

[Lilburd]

I used this page to backup my rom.

http://wiki.xda-developers.com/index.php?pagename=Elf_HowtoDumpRom