Hi,
There are several ways to that. You can easly create new albums by duplicating <album>...</album> tags in the xml file. You can see these new albums when you click on the icon in the lower left corner of the photo portfolio.
The problem is that's it is not very intuitive. You could perhaps add a small explaining text under the flash portfolio ?
An other solution would be to create an other photo gallery page. If you want to use this solution please tell us and we will tell you how to to it.