ModRewrite doesn't match Query string values the way you're trying to make them match. You also need to escape characters.
For case-by-case situations like this, I recommend you consult with a web developer familiar with ModRewrite for assistance.
If you want our assistance, you can hire us as consultants and we will help you over the phone. Use the contact form
www.blubrry.com/contact.php if you are interested and we can send you our rate information and schedule a time to assist you.