First, thanks to everyone that has helped me get this far.
When I installed Slackware, I guess I got Mozilla version 1.0. I wanted to try to upgrade, so I downloaded 1.2.1 from the Mozilla site. At first I couldn't get the installer to run, but that's because I wasn't running it from within X (I was just in another virtual terminal). I had downloaded the .tar.gz file to /usr/local/bin/mozilla. I installed it to /usr/local/mozilla. I didn't see the need and/or couldn't figure out how to uninstall the previous version of Mozilla first

, but the installer did ask me if I wanted to delete any previous installations and I hit 'Yes.'
Ok, my questions...
Did the installer get rid of everything else that might conflict with the new version? How can I check on this?
When I "export PATH=$PATH:/usr/local/mozilla", it only lasts for the one session. How do I get /usr/local/mozilla permanently in my PATH? (I'm sorry, I know this is a really basic question but now when I look around to find out what file I put it in or how I do it, I can't find it anywhere)
Once I do these two things, is there anything else I need to do?
Finally, this is a tiny detail, I know, but my when my mouse in XFCE goes into a Mozilla window, it turns into a standard black pointer from the red pointer I use in XFCE. Is there anyway to keep XFCE's settings in the browser?
-JMagi