I went to the link you mention. It lists two exe files, so I figured that to get out of it a Debian 6 (squeeze) image I need to install it.  So installed, but the image is "lenny" !  So where did you get a working Debian 6 image ?  Did you build it yourself, or did you take lenny and upgraded ?

2011/12/7 Mike Frysinger <vapier.adi@gmail.com>
On Wed, Dec 7, 2011 at 14:01, Boris Rarden wrote:
> I'm running colinux version 0.7.9.
>
> Is anyone running a recent distribution ? I  found an image for Debian 5.0
> lenny.  Has anyone tried upgrading to squeeze with dist-upgrade?

i'm running Debian 6.0.2 just fine

http://blackfin.uclinux.org/gf/project/bfin-colinux/frs/
-mike