Need help in picking multiple random instances of an object!

Hello,

I have a little problem here. First let me explain what I have in my project. I made and object, and I placed multiple (66) instances of this object troughout the layout. I placed them manually, so when the game starts they are always in the same place.

What I want to do is when the game starts, to pick just 15 instances of them, without repeating themself.

Is there a way to pick multiple instances of the object?

Thanks,

Sorin

add object instance variable "thisOne"

Thanks a lot man