Flash & Aftereffects generic transition


Ok I am noticing a increasing numbeer of sites that use very funky effects
that seem to be done in Adobe AE and are integrated in image galleries etc.

I mean it’s totaly inefficient to perform an effect on every single image
then import into flash. Is there a way to create a generic effect such as
blur-zoom, or something new that can only have 1 instance ?

In another words I am trying to make an interesting transition effect
for images in my folio but everything that I created in AE applied to
20-30 images was way too large for web … is there a solution for this?
Like a semi-transparent effect that can just be layered over image … ?

any ideas welcome …