I got this response from creative after emailing their tech support, I haven't tried it yet so I don't know if it'll work, but here's what they said:
Thank you for reaching us at Creative Technical Support; we appreciate
the opportunity to assist you.
I understand, after installing the new drivers for your X-Fi Fatal1ty
sound card, the remote is no longer working with the left speaker. I
apologize for the inconvenience caused from this experience. Please
allow me to assist you further in resolving the issue.
Please follow the steps to uninstall and reinstall the sound card on
your system by following the instructions in the following knowledge
Title: Uninstalling Sound Blaster Drivers and Applications
If you wish, you can contact us at the phone numbers below. Please note
that Creative telephone support is only free for the first 60 days of
ownership to help you get started with your product. At any time after
the first 60 days, you may contact our telephone support to purchase a
Creative Tutor session from one of our expert technical advisors. A
30-minute Creative Tutor session is available any time during regular
operating hours for $12.99.
Operating Hours (Central Time), 9AM-6PM, Monday-Friday, Closed Public
Again, I am sorry for the complications that you have experienced. Thank
you again for contacting us. We hope to serve you better in future. If
you still require assistance, please reply to this email with any
previous correspondence to ensure the quickest and most accurate
Best Regards ,
Creative Labs Americas