how do I insert images into a movie?

[octane1]

say that I want to insert a jpeg bubble like this "POW" sign:
http://www.tvacres.com/images/batman_pow.jpg
into a movie for say a second or two overlayed into the movie, how do I do that?

[alfixdvd]

With Overlay avisynth filter

Overlay (clip, clip overlay, int "x", int "y", clip "mask", float "opacity", string "mode", bool "greymask",
string "output", bool "ignore_conditional", bool "pc_range")

This clip will be the base, and the overlay picture will be placed on top of this.

[octane1]

thanks dude!