How do I convert a BeOS partition back to a Mac OS partition using the BeOS?

Here are instructions for doing so using the BeOS:

1. If you have any data on your BeOS hard drive partition that you want to save, save it. All data on your BeOS partition will be destroyed by the next steps!
2. It's also a really good idea to back up your Mac OS partion(s) on that same hard drive, just in case you make a mistake.
3. Boot the BeOS off of the BeOS Installer CD.
4. When the Installer window appears, press Command-Control-Shift-D to launch the DriveSetup application.
5. In DriveSetup, select "apple..." from the "Partition" submenu of the "Setup" menu.
6. You will then be presented with a display of the partition map of your hard drive. Select the Be_BFS partition you wish to convert back to the Mac OS by clicking it.
7. Select "Apple HFS" from the "Type" pop-up menu, located next to the "Partition Type" field.
8. Click the "Update" button.
9. Click the "OK" button.
10. You will then be warned that changing the partition map may destroy all data on the selected disk. If you are sure you have chosen the correct partition to reformat (you backed up your important data as instructed, right?), click the "OK" button.
11. Close DriveSetup by clicking the close box in the top left corner.
12. Quit the BeOS Installer by clicking the close box in the top left corner.
13. Reboot to the Mac OS.
14. When the Finder loads, you will be asked if you want to eject or initialize your newly converted partition. Click the "Initialize" button.

At this point, if you want to merge this disk partition with one of your other disk partitions, see your hard drive formatter's instructions for the steps to do so.

Of course, you could leave it as a separate partition so that when you want to re-install the BeOS, you'll be able to install it onto that partition with ease. ;-)