1 album available with 2 different thumbnails

Hi all,

I'm classifying my photos by date and in every month, I create a subdirectory with a special event (for example, Christmas party in the 2002-12 folder). And I was wondering if it was possible to have available that nested album in another album where I have all my parties for example. Actually, it would be the same album available by two different ways.

I don't know that much how to code that's why I can't make it right now, but if anyone give me a path to look at, that would be cool. Thank you :D:D:D

Stef