Would this be possible?

Hi again, I need a little advice on some l4d2 stuff. I’m in the process of making a map, and need to make a custom animation for an existing model, called models/props_misc/ceda_banner.mdl. I need it to come loose off of the wall and fly after the helicopter seen in the screenshot then drop to the ground, but i’ve never even attempted modelling/animations ever before.

I was wondering if somebody could instruct me on how to do this, or do so for me. I have a screenshot of the level in hammer for reference. If you need any additional info, like the distances in units or anything, just say.

http://filesmelt.com/dl/diagram1.jpg

Help would be greatly appreciated!

Bump for help.

It would take some scripting. and animation