A brand new leftside menu system please help me

I have a small non comercial, private website:

www.krovoll.net

which I am (sort of) satisfied with.

I should like to get my at present 150 photalbum (each ca 15 photos),
of this kind:
http://www.krovoll.net/Flaanebba/

into Gallery 2,x

To get them in is no problem,
but how do I arrange them?

I should like a better menu system in Menalto,
preferably a "collapsible" table system as I already have on left hand side on my main index.htm