VERY easy problem with types

I'm such a dumb ass.

I've got me type structures and it's all working nicely. Except I can't seem to figure out how to make an array of types.
For example I have


arse.moo = New moo


I want to have more arses.

For example something like this:-

Dim arse(10)

arse(0).moo = New moo
arse(1).moo = New moo
etc

so I therefore have 10 moo data types contained within arse.
Yet somehow I just can't seem to figure it out.

HELP ME! ;)