BasiliskII: How to rip a data cd?

[Constantine]

Hello!

I am trying to use BasiliskII, and I am having some problems in using my 
cd-drive.
I get an error "WARNING: Cannot open /dev/cd0c (Permission denied)".
I have a thought that there is a way to copy an image file from the CD 
and put it instead of the CD.

So, how is it possible to create an image file from a MacOS 7.x CD on 
FreeBSD 4.8?

Cheers,
Constantine.