i think so..there is no software.. you can follow this..
1) Download Y-Browser. This is a free file manager which is very small but incredibly useful.
2) Install it and then run it.
3) Navigate to wherever the image/video files are. You may need to dig around if the images are from an application but there is a search function so that may help.
4) For each file, highlight it and press the left selection key (LSK from here on). Go to File > Attributes and change 'Hidden' to Yes. Click the LSK again to save the change.
5) Repeat that for each file you want to hide.
6) There will be a folder called _PAlbTN in the same path as the image. Delete it.
7) That's it. You can now only view those hidden files through Y-Browser or by hooking the phone up to your PC.
source: *www.allaboutsymbian.com/forum/showthread.php?t=60026&highlight=hide+pictures