I also requested the original thread to be backed up at Yacoby's ES Archive a while back, so if that second thread is lost at some point too, you can still see the original http://www.yacoby.net/es/forum/15/2120181136058300.html.
Yes the guide is outdated so you shouldn't simply replace your dosbox.ini by copying the ini from the guide because of the differences between the versions used. Still, there are some useful tips in there that still apply for the newer Dosbox versions.