When you import an AI or SWF file into Flash Catalyst, it will import the artwork that you see on the design canvas / artboard in Illustrator or Flash. I believe unused symbols setting in your symbol library won't get imported.
But with a few steps you can transform an AI/SWF asset library into a Catalyst component library, which in turn you can import into the Library panel or any Catalyst project...
- In AI or Flash, make a copy on the design canvas of each symbol you want to use in your Catalyst library
- Save the file and import into Catalyst
- You should now see all those assets on your Catalyst artboard
- Select an asset, and use the floating gray "heads up display" (HUD) to convert it to the appropriate component type (button, slider, etc.)
- Once the asset is converted, you can double-click it in the Library panel to give it a more descriptive name
- Repeat this with all the assets you want to use
- Right-click in the Library panel and choose Export Library Package
Now you have an FXPL file, which is a reusable Catalyst component library. To use it:
- Open the Catalyst project that contains your real UI mockup
- Right-click in Library again and choose Import Library Package, and import the FXPL file
Now all the components from your FXPL will be listed in the project's Library. You can drag copies of them out onto the artboard to use them in your project.
Hope that helps!
Oops, actually -- I misspoke a bit. My description above works for AI, but it is a little more complicated for Flash. You'll need to save out a separate SWF file for each Flash symbol that you want to use as an asset in Catalyst. When building your Catalyst library, you can import each SWF in turn, convert it to a component, and then import the next SWF.