Preloading jpegs

Well, I’ve tried searching and have found code that I thought would do the trick for me, but I still have had no luck getting anything to load. What I’m trying to do is simple but I just can’t seem to find a clear answer on how to accomplish this. I’ve loaded jpegs into my main movie before, but I’ve always created swf files of the jpegs with its own independent preloader on the first frame of the swf. This seems to work fine but it does get quite tedious having to create all of these swf’s. I would like to beable to have a folder present on the server where I can just through in some random jpegs and the main movie will then show and hide a preloading bar showing the progression of the jpeg that is loading. This has to be possible…please help!

Thanks in advance…