Unfortunately it seems that NextGen in combination with Flashlight can't be used. I miss the "... then close the window and gallery update preview 'button.
I can only use the option to transfer files from computer to upload to Flashlight. To get a picture two times on the website I must be uploaded also twice.
Is there an opportunity for pictures that are already in the media gallery to place in Flashlight without to upload them again?
Maybe may consider Kriesi that Flashlight can handle Nextgen gallery.
One last note, I know Kriesi must updatet Flashlight to WP 3.3, but the "save all changes" button can't be used in WP3.3. When this button is used then disappear "... then close the window and gallery update preview 'button. The same problem as with the NextGen Gallery in WP 3.3 and WP 3.2.