Need bigtime help with flash trailer to a powerpoint show

Hello everyone,
I was just wondering if anyone knew a way that you could have a flash movie play then automatically go to and play a powerpoint show file which will loop back and play the flash animation.
I tried putting flash in ppt and it worked except for when you put transitions on the slides and then the flash flips upside down and does not play.
I need this show to loop continuously
Please Please I need help
thank you so much