For those interested, I have a code change that will make your images resize during the upload process to the sizes you specify in settings. Here’s what to do:
1) Open ~/wp-content/plugins/nextgen-gallery/admin/functions.php in your favorite text/code editor.
2) Search for “// now create thumbnails” should be line 192.
3) Insert just above the following code:
// now create resized images
foreach($image_ids as $r) {
nggAdmin::resize_image ( $r, 0, 0 );
}
4) Save.
Cheers!
Adam