If you got there, then the webserver is installed which has been half my battle. Go to (webserver address, assuming that you put the newznab files in the root web directory):
xx.xx.xx.xx:81/install
I know. I did install it. It has the install lock and the main page works.
Edit:
I think it has to do with rewrite rules though.
I didnt want to put newznab in the web root, so put it in a directory.. so when i go xx.xx.xx.xx:81/newznab/www/ , it works, when i click login, it tries to go to xx.xx.xx.xx:81/newznab/www/login, but with the rewrite rule, it should actually go to xx.xx.xx.xx:81/newznab/www/index.php.php?page=$1.
i dont know how to add rewriterule for Lighttpd.. so i should wait for the instruction lol