Adding Preloaders.. Please Help :)

Hello,
I need some help with preloaders. I’ve went through the tutorials and the forums but I’m still not grasping how I can implement the preloaders. My website loads external swfs into a blank movie and I’m just trying to preload those. If anyone could help me it would be greatly appreciated. Ive zipped the main page and one of the external swf sources. Im sort of pressed for time otherwise I would just take my time to figure it out.
The external swf source is my photos page. If anyone could tell me why the photos are being cropped back to 300x200 instead of 320x240 (could of swore i resized everything correctly) that would also be a big help.
thanks again