Destroy one instance of a sprite created at start

I've beat my head against this for a couple days, and have read a lot of the posts on here about dealing with instances through UID's, select n'th, etc.

Here is a .capx of what I am attempting,

http://dl.dropbox.com/u/30187917/instance_on_creation.capx

I want to create enemies at specific locations, the enemies are represented by the same sprite, and the HP for each enemy is stored in an array. I use the array to populate 2 values, a maximum and minimum HP for each enemy location. When a minimum HP variable reaches 0 I want the enemy at that location to be destroyed. My problem is, regardless of how I set this up, it's very difficult for me to specifically (and elegantly) assign which instance of the sprite gets destroyed.

Any suggestions would be greatly appreciated!

first, you have four sprite instances - one that is on the right side is your Sprite.Instance=0, top left is Sprite.Instance=1, midle left is Sprite.Instance=2 and bottom left is Sprite.Instance=3. Second, when enemyhp1_hpMin=0 it will destroy Sprite.Instance=0 - right Sprite, and number of instance will change so the second sprite (former Sprite.Instance=1) will be Sprite.Instance=0, and it will be destroyed, and third sprite will become Sprite.Instance=0 et cetera.

Use private variable.

first, you have four sprite instances - one that is on the right side is your Sprite.Instance=0, top left is Sprite.Instance=1, midle left is Sprite.Instance=2 and bottom left is Sprite.Instance=3. Second, when enemyhp1_hpMin=0 it will destroy Sprite.Instance=0 - right Sprite, and number of instance will change so the second sprite (former Sprite.Instance=1) will be Sprite.Instance=0, and it will be destroyed, and third sprite will become Sprite.Instance=0 et cetera.

Use private variable.

Thanks for getting back to me! Your point about the sprite instances makes sense. I'll try using an instance variable, and if I get it working I'll post my results. Thanks again man, very informative :)

More commented picking for you in capx

More commented picking for you in capx

Glorious! This makes so much more sense then what I was attempting, thank you so much!