You do not need to edit your feed. podPress adds all necessary elements - the iTunes:New-Feed-Url, too. Don' worry about that part.
The suggested course of action for moving a podcast is to create the podcast at the new address and set then the iTunes:New-Feed-Url and maybe create such a .htaccess file with a redirect. (For such a .htaccess you still need a text editor.) With the help of this iTunes:New-Feed-Url in the old feed iTunes will catch the new address automatically after some days.
But now that you have already moved your blog and shut down the old feed, I would recommend to try a redirect via an .htaccess file.
If you have trouble to create a file with that name on your computer then choose temporarily a non-default Permalink setting (see the related page in Site Admin). That will create such a file in the same folder as the wp-config.php file. If you do not want to use a non-default Permalink setting you can switch back after you have copied this file to your computer. In that case you can also delete the section:
# BEGIN WordPress
# END WordPress
The redirect in your case (and if you put the .htaccess file in the folder which contains the wp-config.php of the new blog) would be
Redirect 301 /wordpress/?feed=rss2 http://www.failboys.com/?feed=rss2
All who requests the old feed address should be redirected to the new one. That may work for iTunes, too. (the reason why I'm not a 100% sure about that is because I have not done this before with iTunes. But I have used this Redirect stuff with other feeds and files successfully before.)
Because your podcast has already moved, it is very likely that enabling the iTunes:New-Feed-Url in the Feed/iTunes Settings of podPress is unnecessary.
(If you change the Permalink settings to a non-Default setting and you do not see such a .htaccess file when open the folder in your FTP program then search for a setting in your FTP which is maybe called "Show hidden files".)