Custom save post

I was Given a task like.
we have few images in the upload tab
we have a button name send to editor.
Now i need to write a button next to send to editor with name send to Attachment editor (infact i will have an another instance of the editor with different id like attach editor.)when this button is clicked we need to add images into that attach editor and show them in a sequence..
then when publish button clicked to we need to post this data which is in the attach editor as a meta value with one static key name.

can some one help me out in completing this job