I'm looking for a image gallery that will work. I'm currently using Portrait thumbnail gallery and I love it, but...

If I have a large graphic landscape mode panoramic it crops it alright for the thumbnail but when I click on View original it is no where near the original size. I can get it to work by changing the margins on that photo, but with a lot of photos this will be time consuming. Is there any gallery out there that I can drag and drop my photos into, and will just work, shrink them down to thumbs and open to original size when clicked?

Thanks so much!