custom wordpress plugin nextGEN Gallery

i have one wordpress site, use plugin nextgen galery, i need to do some custom change for the plugin 1. the album/gallery texts are all capitalized, i need it normal. 2. image listing page, i need show the item names, not all displayed as gallery name 3. need to set the album cover by myself. (i can set album cover before, but now cannot --- coz cannot find the images which i have uploaded from the set album option)