Really, don't bother with any Norton product for your Mac. They no longer actively support the platform and provide negligible benefits anyway. Tiger has a good firewall built in and if you want to run anti-virus software, download
ClamXav. It's free.
If you are concerned about privacy, you can monitor things with
Little Snitch.
Norton disk utilities can cause more problems than they solve, so skip them too. Alsoft's Disk Warrior is the program of choice for most, but there is also Drive Genius and Tech Tool Pro. All three provide different levels of data recovery or corruption protection. They are all a little different, but have a lot of overlap. Be sure to get the one that covers what you want it to do. Most people end up getting two of the three since there is no true complete solution for data recovery yet.