ive already answered this question w/ the link above...here's the text from the manufactures website.
2.6 Can I use more than one Firefly PC Remote with my system?
Yes. You will, however, need to change the "channel ID" of one remote so that the commands sent from each don't conflict with one another. To change channel ID, select the "Settings" in the Beyond Media Basic Main Menu, then select "Firefly Settings." Use your Firefly Remote to change the "Remote Channel" option from "all channels" to a specific channel, then follow the on-screen instructions to complete the change.
PW5 64, E6300@2.8, X1900XT, (5) 74GB RAPTORs, 2GB Corsair XMS800, ATI HDTV Wonder, DELL 30\"