The apt sources.list

[Tom Huckstep <tomhuckstep@bigfoot.com>]

I have the full set of 6 potato r0 CDs and my /etc/apt/sources.list
file looks like this:

deb-src cdrom:[Debian GNU/Linux 2.2 r0 _Potato_ - Official Source-3 (20000814)]/ unstable contrib main non-US/contrib non-US/main
deb-src cdrom:[Debian GNU/Linux 2.2 r0 _Potato_ - Official Source-2 (20000814)]/ unstable contrib main non-US/contrib non-US/main
deb-src cdrom:[Debian GNU/Linux 2.2 r0 _Potato_ - Official Source-1 (20000814)]/ unstable contrib main non-US/contrib non-US/main
deb cdrom:[Debian GNU/Linux 2.2 r0 _Potato_ - Official i386 Binary-1 (20000814)]/ unstable contrib main non-US/contrib non-US/main
deb cdrom:[Debian GNU/Linux 2.2 r0 _Potato_ - Official i386 Binary-3 (20000814)]/ unstable contrib main non-US/contrib non-US/main
deb cdrom:[Debian GNU/Linux 2.2 r0 _Potato_ - Official i386 Binary-2 (20000814)]/ unstable contrib main non-US/contrib non-US/main

I have two queries about this:

1) Why does it say unstable when I want the stable distribution.  On
the CD stable, unstable and frozen are all symlinks to potato.  Can I
safely change these entries to stable?

2) How do I install the source code for a particular package?

Tom