Migrating Layers In-between Canvases in Illustrator?

[cleanup]

I have some artwork in an .ai file, but it's spread across many different layers. How do I safely migrate these layers to another .ai file with all of their attributes and proper layers intact? If I copy and paste, it just pastes it all into one layer. In Photoshop, you can select a bunch of layers, and drag and drop them onto another canvas. How do you do it in Illustrator?

Any veteran vector artists wanna help me out? Thanks.

 

[Sparky's]

Simple, select all the desired layers and in the Layers drop down menu select "Paste remembers Layers", then copy paste and all the layers will retain the individual information. All you have to do is maybe reorganize the layers to satisfy the order you need.