Loading in images with a preloader?

im trying to get images to load in with a preloader, and i have some preloader files, but i dont know how to link them up. i have several buttons that use the following code:

on (release) {
loadMovie(“ta_logo.jpg”, _root.holder);
}

They load it into an empty movie clip. Is there a way to use a preloader to show the progress as it loads it in? Thanks in advance