Import order

Hi. I’m new to OOP.
I’d like to know is there a way to make loader, and the content in the same SWF file, so that the loader will be imported first, and when it’s ready it’ll load the rest. I know that’s possible in Adobe Flash putting the loader in first frame, and import the rest of my app in second frame. I also know that I can make two swf files (loader and content) separately.
So, is there a way to put this together in one file?