You've heard of sprite chains before, now I give you the Sprite String!:
If you send an expression a string that is meant to use a number it will convert it to a number.
Because of this little "feature" you can use GetToken(string, N [, delimiter]) to create arrays from strings.
While its a bit easier to figure out, I wouldn't suggest using this method for a whole lot of instances, as I've noticed a slow down on anything over 100 sprites.
Probably because of the text conversion.....