Does Export Network Setup not work in 10.5?

So I'm building a core image for my environment, and I'd rather not touch all my machines to connect to a WPA/PSK network with a 64-character password. I can't seem to export Airport settings though, and I'm wondering if this is a bug or my error. Here's what I've tried: 1. Set up the custom network settings for Airport 2. Change the Location to a custom location 3. Create a new "Automatic" location 4. Select Airport (while the custom location is active) 5. Click gear icon -> Export is grayed out 6. Switch to automatic location, Apply 7. Select custom location, select airport, click gear icon -> Export is still grayed out. Any ideas? I've all tried turning airport off and trying again - it just doesn't seem to work, but I can't find any documentation that it's broken, only documentation that it works (Apple website instructions). Thanks!