[newbie] cdrom deletion error

[chronos]

I deleted the wrong cdrom when trying to setup gnome
toaster. I issued the command cd /dev && rm cdrom && In
-s scd0 cdrom. How do I add my cdrom back in ? I get the
error message no such file or directory. Also it says to
be sure I have access etc. What command do I type to
reset it back ? 
               Thank you, Chronos.

the serpent and the egg