Themes for drupal 4.7

I've seen many beautiful theme which are developed for version 5.x
Currently, I'm using 4.7.x and i 'd like to modify my current theme B7 to one of the beautiful themes (like Acta) in version 5.x
I'd like to know if i downloaded that theme and install in my drupal 4.7.x, will it be work or it is only for version 5.x?
Which themes can also be used for version 4.7.x ? (developed for version 5.x)