revert to Etch from Lenny/Sid

[kedmond <kedmond@gmail.com>]

Hello,

   I am using a Thinkpad X21 laptop with 384 MB of RAM and a new 40
gig disk.  I installed Debian 4.0 (Etch) via the floppy disk install.
Installation wa actually really pleasant, especially over the fast
network connection.  With some work, I got my PCMCIA wifi card to
work.  Ever since then, my laptop's been stable like a rock, and I had
no
complaints.  It would effortlessly connect to my wifi network and
"just work."

    Anyways, the other night I tried to use "apt-get install" to get
Pidgin.  However, it said I needed a long list of libraries that I
didn't have.  I didn't know that I could install just those developer
packages, and instead added "sid" or "unstable" to my sources.list.  I
ran "apt-get install -f" or something like it, and then Debian
basically changed itself to Lenny/Sid.  Now the computer boots to
command line, instead of automatically going to gnome like it used
to.  And the wifi card (DWL-650g) is no longer automatically
recognized and it can't connect to my wifi network.  And I have to
reset my router to properly connect via ethernet cable.  So this has
all been very frustrating.

    I just want to know how to make Debian like it was before, with
Etch.  Thanks.

-kedmond