AVI or MPEG file to frames/pictures?

Hi there peoples!

I'm looking for a software or something to make AVI or MPEG
files to pictures/frames! (also a movie is build in pictures,
so all these pictures i need to have saved!).
I need this for making a signature on a forum i will use, i've
film with fraps and will edit in Sony Vegas and save as AVI or
MPEG. Then i want this program or tip how i can make ALL
pictures/frames from the movie.
After that i will put in pictures one after one into PhotoShop
there i will build it up!

Why do im not make from a AVI or MPEG converter to gif?

Its because of i want edit the movie in my own way! In this way
i make it to pictures, there i can choose the speed myself, and
on top of the movie i will probly have some texts and that.

One guy told me i can do this by downloading VLC media player
and take pictures after pictures. But i mean.. Wouldn't it be
hard and take alot of time? I mean, does a timeline chooser or
something like that exist in that program? :S
Because i really need ALL pictures from the movie file! And i
guess if i would print it myself it would jump over some
frames/pictures that is in the movie! And that would make the
animation bad.