Well as far as Creative go (and I assume it's a live! card) then there is currently no support under Linux.
However you may add you voice or get support for it from others via their forum and developer sites, as linked to in
this thread. Try the second post.
As for your Wireless Duo, it appears they were designed specifically for M$ Windows, to incorporate M$ Windows only functions (ie. they probably are tied to the M$ XP OS, and IE, thus making them single product only). Even the Mac capable versions seem to require IE to work properly.
In fact there product range seems to be aimed directly at IE users.
Logitech - Non-Windows OSAll of which suggests that Logitech are owned or invested in by M$, as most other companies offer far better support than this.