Hello,
You should check out the beta of NI-488.2 v2.3 which will run on specific linux distributions that have a 2.6 kernel (Mandrake 10.0, Suse 9.1). While we do not guarantee it to work on FC3, you will probably have better luck with it than 0.8.6. See www.ni.com/beta to sign up.
Scott B.
GPIB Software
National Instruments