How do I move GarageBand's Lessons and other libraries to another drive? I'd like to move GarageBand's lessons ("Learn to Play") to another drive. How do I tell GarageBand where to look to find the files?

Some context : I removed my Late 2009 MacBook's SuperDrive and now have two internal drives, a SSD drive on which I boot and the original internal drive. The "Learn to Play" directory in /Library/Application Support/GarageBand is now 7GB and I haven't downloaded all the lessons I want. It is on the SSD drive, but I need to save space on that disk. I think that for the lessons it is less important to have a fast drive than for the loops and instruments (but maybe I'm wrong?), so I'd like to move them to the other drive.
Quit GarageBand
Move /Library/Application\ Support/GarageBand/Learn\ to\ Play/ to another drive
Open Terminal
Type ln -s followed by a space
Drag the folder created in the second step into the Terminal window to insert the path
add /Library/Application\ Support/GarageBand/Learn\ to\ Play and press Enter


Test it both the external drive connected and disconnected to be sure GarageBand doesn't have a problem with the LearnToPlay content not being available.