NextGen Gallery how to organize & display?

I have a page that I would like to display several albums on that have sub gallery’s. I would like it to display like below…
The page would only display the parent albums 2007, 2008, 2009, not the child gallery’s. You click on the 2007 gallery and then the child May, June , July would be displayed. You then click on May and it would display the photos for May.

Page:
Album 2007
–may
–june
–july
Album 2008
–may
–june
–july
Album 2009
–may
–june
–july

I hope this makes sense…
If someone knows how I can get it to function like this it would be a huge help.
Thanks,