Please do not post slideshows to the Portal. They are against the rules.
http://www.newgrounds.com/wiki/help-information/terms-of-use/game-and-movie-guidelines
If you want voice actors, the best place is the Voice Actor forum. You can also try looking up voice demos in the Audio Portal, or you can use the "Collabinator." It's the part that says "Team Up!" at the bottom of the drop menus for the buttons at the top of the page.
Good luck. :)