The link given for the .iso file http://www.dimakrasner.com/puppy/guydog ... -5.0.1.iso in
http://www.murga-linux.com/puppy/viewtopic.php?t=72576 returns 404 error.
Is it not available anymore?
This link is of 2011 vintage. May be it has gone out of date or the distribution itself might have been discontinued or replaced by something else.