After a bit of fiddeling I worked it out. I had created a fully CMOD-able dir called images/rsgallery2/ and renamed the original. I then had to re-rename the original direktor and removw it with the regular remove Everything alternative. After that I uninstalled and everthing was as it used to. However: I dont seem to get around the batch upoad problem.
1) It appears to semi-function: all images are uploaded to the /images/rsgallery2/original/ folder, and I see them correctly in the thumbnail view where one is given the option ->Next ore Upload. The Next button doesnt work so I press the Upload button again. At this point the screen returns to the batch upload.
However if I look at my pictures, 2 or three have been added of the 10 (size: 7,7 Mb) zipped pixs I tried to upload. They exist as Images also in the front end. The other are mysteriously disappeared.
I also tried the add another feature on the Upload images with exactly the same result, leading me to believe that there is some invisible "can only upload 2-3 pixs at a time boarder.
2) A front-end batch uploading function would be a dream come true......

It would certainly fit my needs like a glove.
Thanks still and keep up the great work. Rsgallery has enourmous potentiale.