Only have to import your package once not in rootdir?

If I put an as3 package in the same directory as my fla, I do not need to import it at all, it is accessible to all my movie clips. If I put my code in a sub directory then I have to import it (ie. Import mySubFolder/myPackage.as3), and I have to do this for EVERY movie clip that uses it.

Is there some way to Import globaly without putting your code in the root directory of your project? If so, is there any reason this would be a bad practice?