Free extensions for Joomla!

Hi,
I use zoom media gallery since a long time (since mambo), and drag'n'drop simply alway ran perfect.
But with Zoom 1.5, the jupload applet doesn't work fine. When dragging more than one pics, it often stays blocked trying to adding files to the upload list. So impossible to upload 100 pics with drag n drop...
I've downloaded the jupload from sourceforge and tested the demo, no problem.

Does anybody have had the same problem? how to solve it?
or how to install another jupload version?

Thanks for help.