Create a gallery by clicking on User CP then go to Your Control Panel and click of edit gallery. Create album and import your pictures, it's best to resize them before you try to import them. I can't remember what your post count has to be before you can create a gallery, if it won't let you yet you will have to pad your post count. It takes a little playing with it to get it to work but you can go down to the test forum (all the way to the bottom on the list) and play with it.
Denny