You can build an online Flash Gallery very easily by using Picasa(free) and SimpleViewer(free). Only four steps and you can let the whole world to see your nice gallery.
1. Install Picasa
Download2. Copy SimpleViewer Picasa Template
You can download the template here. Uzip the downloaded file to Picasa's template folder(usually C:\Program Files\Picasa2\web\templates).
3. Use Picasa to create a gallery.
Select a folder you want to make as a flash gallery in Picasa.
Then Export as Web Page.
Choose the pictures' size, Title, and the destination folder of the flash gallery.
Select the SimpleViewer Template.
You got it!
4. Upload gallery to web server.
The final step is uploading your gallery to your web server to share it with your friends.
Note: You can also set some properties of the gallery by editing the gallery.xml and index.html generated in the gallery folder. These information can be found here.