One more level

[BBones]

Ok, I want to know if this is possible. I shoot racing pics, which has many dates, groups and numbers. I want it to look like this for a drill down


Race Group
Race Date
Group (fast, faster, fastest)
Racer Number (person driving)


Seems that Smugmug is one short in helping me here, or am I missing something? It seems to be:

Catagory (race group)
Sub (Race Date)
Gallery (Group)
What Bones needs (person driving)