All right guys ,the feature 
IJCT request is c2 "THE" must have feature.
I mean ok yes you can create containers but you cant do complex stuff with them unless you write events for every one of them, create variables for each one object that container has and anyway complex stuffs.It will be great if we can create a "combination of sprites object" in the editor (like the warp selection feature) and give it a new name and even new behaviors .So my point is that, lets say that we want to move 5 different objects( in my case sprites) the only easy way to separate them among the others same object that exist in my layout is to add an "id" variable for every object.after that i pick them relative to "id" variable and do stuffs with them.instead of that i want to warp a selection of object create one new "object-group" that i can select it like i select a normal object and do stuff with it and if i want to edit it i will just double click it and move, scale, delete sprites and stuff.
So yeah, i think this will be a great feature if the developers can implement it.
Maybe i missing something here about the pick events because i am inexperienced with c2. But if there is a way to do stuffs like IJCT says i wanted to know( no spriter, no other animation software, no extra frames, just with c2).