This may not be for everyone: have a look at how you can create "jagged arrays". Here's a jagged array which really is a nested array:
PS> $array = 1,2,3,(1,('a','b'),3),5
It has five elements, and element #3 (start counting by 0) is an array itself which in turn holds a third array in element #1.
Check out its behavior:
PS> $array[2] 3 PS> $array[3] 1 a b 3 PS> $array[3][0] 1 PS> $array[3][1] a b PS> $array[3][1][0] a PS> $array[3][1][1] b
