Since you're on Fedora Core 2, you most likely installed things through rpm. You did that by rpm -i (or Uvh) <package name>. To undue that, you simply type: rpm -e <package name>. If you installed them as root, you'll have to be root to uninstall.
If you complied them from source (much less likely, but possible), then you need to go to where the source is, and type: make uninstall, same root rules apply to that as to rpm.
I strongly suggest keeping your old kernels. They don't hurt your system at all, and if you manage to screw up the current kernel (as I have done), having the old kernel is the difference between being able to boot into linux and repair, or going to great length to repair a computer that won't boot. The kernel takes less that 100Mb of space, more like half of that, so I don't think you have any need to remove it, unless you're on a 1 gig system.
By the way, you have no need for anti-virus on anti-spyware on a linux box. The only reason I could see anti-virus is if you are acting as a file or mail server for windows machines.
The reomval for the specific package you mentioned would be:
rpm -e fsav-wks-4-52-2481
To get a list of everything installed on the box, you need rpm -qa, although this is a HUGE list, so you may want to do rpm -qa|less
which will show you things one screen at a time.