Use the search - this has been asked a number of times before.
Short answer, no, you can't strictly put into folders - gallery just views *everything*.
To hide, you need Y-browser, then mark attributes as hidden.
Yeah a Major problem i think, even my N80 is the same, i tell you what though the 6680 was a dapadon phone had many usefull functions that seem to have been negelected in the new symbians!!!