Macromedia Flash Files

Grid Image Loader
Grid image loader loads images and creates boxes with rollover effects, the code looks like this: file_to_load = sample.jpg grid_width = 100 grid_height = 100 grid_line_thickness = 1 grid_color = 000000 grid_alpha = 20 buttons_alpha = 100. You can change boxes size, thicker grid, etc.
Glowing Arrows Preloader
Place the clip arrows preloader in the first keyframe of any flash file, remove other content from that same frame; place your normal content at frame 2; preloading animation will play while file is loading; when file is completely loaded it will go to frame 2 and will show your content.
Animated Loading Bar
Copy the preloader clip form root of the file and paste it in first frame of your flash file, move all your other content to second frame. When file loads the preloader will stop the timeline and will play the loading animations, when loading is done then it will tell its parent level to go to and play second frame (your file content).