Thanks for the hellp, this is what I needed to read and got it working.

I just uploaded 30 pics. It all went fine, they were between 2-4 mb each.

Did get an error in case someone needs to know. Im using joomla 1.5.1 and RSGallery2 1.14.3 Alpha - SVN 649.

After the upload on the second page where all 30 pics were displayed I got this message at the top:

Warning: getimagesize(/usr/home/MEUSERID/public_html/joomla15/media/rsginstall_47e7a930f0f42/Array) [function.getimagesize]: failed to open stream: No such file or directory in /usr/home/MEUSERID/public_html/joomla15/administrator/components/com_rsgallery2/includes/file.utils.php on line 311