Hi there! Welcome to LQ.
The likelihood of success in this venture are low, given the age of FC7, and the lack of information you have provided about the wireless device.
I don't believe it will be possible. Why not upgrade to Fedora 11 or 12 or even 13 if it's out yet? It should be soon if it isn't.
Also, allow me to suggest you use a more descriptive title for your thread. You can click the "EDIT" button on your post, and change the title to something such as "Installing wireless device on FC7".