hi Erol,
you may have to select an older back-up to find what you want
so - it really depends a lot on what you are looking for
some things that are backed up may be out of date
the back-ups created do not correspond to updates on the site :P
if you go to the main site,
http://archive.org/web/web.phpthen enter the URL for Bills site, it will give you a number of "snap-shots" to select from
http://www.donkeysstable.com/at the top, you select a year, and it will give you a calendar to select from