HELP:Preloading 2 SWF


I am trying to preload two swf into main movie.
I managed to preload one .swf with MovieClipLoader with using getProgress and with loading bar and everything works pretty fine, but I read I can preload more files into a single movie clip or level and I can alternately create a different MovieClipLoader object for each file I load. I read in ActionScript Language Reference book, but I tryed different thing and nothing seems to work.
I want to preload both at one time, lets say 1st .swf has 1MB and the 2nd .swf has 1MB, so I want the preloader to show 2MB of preloading with the progress in loading bar.
Can be this done? I spent lots time to modify the script and nothing with the sinngle .swf works perfect.