1. In the settings panel click the “+” to “Create a new setting
2. Choose Quicktime export components
3. Under Encoder type choose Flash Video (FLV)

Compressor 3

Compressor 3

4. Click Options to setup the FLV compression options

Flash Video Encoder

Flash Video Encoder

5. Final hit ok to close the FLV compression options Give your preset a name/description and click save