loadClip;preloader over last image question

Hi guys,

I’ve been trying to figure this out for myself, but i just cant get it.
I tried the search, but didn’t find it either.

In a lot of galleries, photoviewers etc. you see the preloader covering the old photo whilst loading the new photo. (for example http://www.letstakepictures.info/)

Is this effect possible with the loadClip(); functionality?
Whenever i try to do this the old jpg is discarded the moment the new jpg is loading. Is there a way to buffer the old one until the loading is complete?

Thanks!

Lesley