OK, I figured out that this Legacy content is on the Logic 9 install disks. Here's how I solved it. I used Pacifist, which was mentioned in some other threads, but not really explained. I was also unsure whether this was a Logic 9 legacy issue, or something from way back in Logic 7 or 8. Hopefully this will help someone....
1. Download and install Pacifist from Charlessoft
2. Get all your Logic 9 disks ready, and open the Logic Studio Install disk in Pacifist. (You will need to insert all the Logic disks to open the complete package.)
3. in Pacifist, search "legacy". In mine, this gave 5 results: Legacy Bass Guitar, 10 Legacy Instruments, 04 Logic Legacy Kits, 12 Legacy Instruments, and 06 Legacy Spaces. The Pacifist browser window shows the file path.
4. In the Pacifist browser, right-click (or control-click) on the folder, and choose "Extract to Custom Location...", and extract to the corresponding location on your hard drive:
- /Library/Application Support/Logic/Channel Strip Settings/Track/04 Bass Guitar/Legacy Bass Guitar/
- /Library/Application Support/Logic/EXS Factory Samples/10 Legacy Instruments/
- /Library/Application Support/Logic/Plug-In Settings/Ultrabeat/04 Logic Legacy Kits/
- /Library/Application Support/Logic/Sampler Instruments/12 Legacy Instruments/
- /Library/Audio/Impulse Responses/Apple/06 Legacy Spaces
That should be all you need to add the Legacy content, without doing a full install. They are all just presets, except the EXS stuff, which is presets and samples — so if you want that you need to add both the EXS Factory Samples/10 Legacy Instruments AND the Sampler Instruments/12 Legacy Instruments. Otherwise they can be added modularly.
