Deploying Tweetr AS3 site on ISS without cURL

I've been developing a site for a client that uses the Tweetr API to post messages to a user's Twitter account. It has now been discovered that the destination server is running IIS, so no mod_rewrite for the Tweetr proxy. Also cURL is not available, which prevents the proxy from forwarding requests.

The lack of mod_rewrite can be got around, but I need an alternative to using cURL that doesn't require anything not included in a very basic PHP 开发者_如何学JAVA5.2 install. I'm considering trying to recreate the proxy functionality with jQuery AJAX, but at the same time that seems like a very lengthy solution. Can anyone point me in the right direction here?

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I think that this might be what you're looking for.