Mod_rewrite rule help

Hi,

I am on lighttpd engine and I have one doubt :-

I am planning to transfer my forum from http://mydomain.com/forum to http://mydomain.com

so I need to do something with mod_rewrite rule, as I am running in lighttpd engine, so i need to edit lighttpd.conf folder for it.

Now my doubt is what would be the command to write :- what i think is this :-

"^/forum/(.+)" => "http://www.mydomain.com/$1",
        "^/forum/([^&?]*)&([^?]*)$" => "http://www.mydomain.com/$1?$2",
	"^/forum/([^&?]*)&([^?]*)\?(.*)$" => "http://www.mydomain.com/$1?$2&$3",

Code (markup):

Now Please suggest me solution... I have not tested it, nor i am not in option to test it, so if any of you have any idea or have some experience than do kindly reply back with your best solution.

Thanks

 

or this:-

"^/forum/(.*)" => "http://www.mydomain.com/$1",
        "^/forum/$1?$2" => "http://www.mydomain.com/$1?$2",
	"^/forum/$1?$2&$3" => "http://www.mydomain.com/$1?$2&$3",

Code (markup):

Please suggest me right way.

Thanks