can some1 please convert this htaccess to nginx rewrite?

[Lemon Head]

i attached it , i gave up on the image verification
and just set it back to vbulletin original captchta
i'm using the vbseo rewrite rules from the following thread
http://www.vbseo.com/f4/howto-nginx-23485/ they were posted
by a person in the vbseo staff so thought theyll be fine

Attachments:
http://www.ruby-forum.com/attachment/3183/nginx.conf

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