iPhoto will let you put your picture library anywhere. This set of instructions explains how to specify where it should go and how to use it. This set of directions is specifically for Film 20P but the concepts are broadly applicable.
Here you can learn how to export a video file from an iPhoto album.
GarageBand will let you drag and drop a video file into to the program so that you can tailor a sound file to it. This set of instructions only covers importing and exporting procedures.
Tutorials on resolution and color space selection.
Information on how to use Quicktime Pro to produce podcast audio files.