Was there supposed to be an audio portion? As an animation it was ok, but I suggest saving the 4mb by using the stock ones for colossus.
As for voice acting, that's one of the last things you work on for a mod. You need to work on a skeleton outline first for your campaign. The good thing is it's FS2 based so you can use existing stuff as placeholders as you make missions.
Actors though will want to know what roles are available. Plus it's nice to have a sample line to say so you can choose what roles to assign to who, that way the best voice gets that particular role (some people are better for diff things).
I for one would be interested, but only when you have a proper post in the Voice acting thread (go there to see examples of how to advertise for your campaign when the time is right).