Does Flash Catalyst CS5 work with CS4 products?
Designs created with Illustrator CS4 and Photoshop CS4 will open in Flash Catalyst CS5 with fidelity. In addition, SWF files created with Flash CS4 Professional can be used in Flash Catalyst when published to the Adobe Flash Player 10 runtime. Roundtrip design with Illustrator and Photoshop is limited to CS5.