How do I configure nginx appropriately? (Node.js, PHP)

CompassionPit.com is a Node.js app. The CompassionPit blog is WordPress and the CompassionPit forum is VBulletin. Everything was working fine and dandy until I installed the VBseo plugin for VBulletin, which wants me to add these lines to my nginx configuration:

        location /forum/ {
                rewrite ^/forum/((urllist|sitemap_).*\.(xml|txt)(\.gz)?)$ /forum/vbseo_sitemap/vbseo_getsitemap.php?sitemap=$1 last;
                try_files $uri $uri/ /forum/vbseo.php?$args;
        }

        location ~ /forum/(.*\.php)$ {
                rewrite ^/forum/(.*)$ /forum/vbseo.php last;
        }
        location /forum/vbseo/(includes|resources/html|resources/xml)/ {
                allow      127.0.0.1;
                deny      all;
        }

Here's the updated configuration file, including the 3 new blocks, which I placed at the bottom of the file.

    server {
        listen       80;                # your server's public IP address
        server_name  www.compassionpit.com;
        index        index.php index.html;

        location ~ ^/$ {
            proxy_pass http://127.0.0.1:8000;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header Host $host;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            break;
        }

        location @blogphp {
            internal;
            root /opt/blog;
            include fastcgi_params;
            fastcgi_param  SCRIPT_FILENAME  $document_root/index.php;
            fastcgi_index  index.php;
            fastcgi_pass   127.0.0.1:8080;
            break;
        }

        location ~ ^/(forum|blog)/($|.*\.php) {
            root /opt/;
            include fastcgi_params;
            fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
            fastcgi_index  index.php;
            fastcgi_pass   127.0.0.1:8080;
            break;
        }

        location ~ ^/(blog|forum) {
            root /opt/;
            try_files $uri $uri/ @blogphp;
            break;
        }

        location ~ ^/(forum|blog|vbulletin)/ {
           root /opt/;
           break;
        }

        location @backend {
            internal;
            proxy_pass http://127.0.0.1:8000;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header Host $host;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            break;
        }

        location ~ / {
            root /opt/chat/static/;
            try_files $uri $uri/ @backend;
            break;
        }

        location /forum/ {
                rewrite ^/forum/((urllist|sitemap_).*\.(xml|txt)(\.gz)?)$ /forum/vbseo_sitemap/vbseo_getsitemap.php?sitemap=$1 last;
                try_files $uri $uri/ /forum/vbseo.php?$args;
        }

        location ~ /forum/(.*\.php)$ {
                rewrite ^/forum/(.*)$ /forum/vbseo.php last;
        }
        location /forum/vbseo/(includes|resources/html|resources/xml)/ {
                allow      127.0.0.1;
                deny      all;
        }

    }

You see, http://www.compassionpit.com/forum/general-discussion/ is getting served by WordPress.

Any suggestions for how I can condense the nginx file to integrate the VBSEO changes?

Thank you!

–Zachary