I don't know what caused the urls to change, really! And the only files ive been messing around have been on the templates folder.
As for the blank pages, Ive replaced line 62 with $this->root =
"/home/yoursitename/public_html/"; (Twice already! I tried changing yoursitename to my site name - (mysite).pcriot.com - and my site without all the dots - (mysite).)