Archive and Install
This is the setup for 10.4 Tiger. I'll assume it's the same for 10.3 Panther.
The Choices are:
- Upgrade
- Archive and Install
- Erase and Install
What you want to do is "Archive and Install". I think what it does is put all your files currently on your hard drive in a folder on the root(top) of your hard drive called old system or something like that and installs a new operating system to boot into.