Load SWF files with tween effect - AS3.0 + Flash CS3

Load multile SWF files from XML data and upon NEXT and BACK button it should appear in Movieclip.. and it should have Tween effect..

I have created some code... in which i have loaded all the SWF on Stage.. and depending upon NEXT and Back button , i need to adjust next SWF file to show in movie clip.

plz help me