If there is just a piece or two that you wish to remove and you know where it is, you can simply drag it to the Trash. For example, if you have a printer driver installed for a printer that you do not have, you can drag it from the extensions folder to the Trash.
However, if you have installed a software package and you do not know what all of the pieces are, you can use the customized removal feature of the Mac OS 8.5 Installer.
1. Insert the Mac OS 8.5 CD into your computer.
2. Double-click on the Mac OS Install icon to start the Installer, clicking continue.
3. Choose the hard drive which contains the Mac OS 8.5 package that you wish to remove.
4. Because you already have Mac OS 8.5 installed, you will see a dialog that gives you the option to Cancel, Reinstall or Add/Remove.
5. Click the Add/Remove button.
6. Choose the package you wish to remove, then choose Customized Removal.
7. A dialog box will appear. Choose the specific package(s) that you wish to remove. If you wish to remove every piece of this package, choose "All" from the selection menu.
8. Click the "OK" button.
9. Choose any additional packages whose pieces you wish to install or remove.
10. When you have selected all of the packages you wish to remove or install, click the "Start" button.
The installations and/or removals that you select will run and prompt you to restart when complete. After this occurs, you are done.