Modifying MWPhotoBrowser in iPhone

Hi I am have added the MWPhotoBrowser in my iPhone application it works great but now i need to add a little more functionality to my photo gallery.

basically what to do a couple things:

add a button to the navigation bar
decrease the space between two images.

However I don't know how to approach this problem.. should I subclass the Photo Browser or should I make changes in the Photo Browser's source code.

P.S. i tried to modify the code directly in MWPhotoBrowser.h file which didn't work. No changes were made. I'm super new to iPhone programming so i don't have much idea what is going on. Any help would be greatly appreciated. I know its a noobish question so please go easy on down votes :)

Solution

In the MWPhotoBrowser.m file find the setNavBarAppearance method and add this

UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd 
target:self action:@selector(someAction)]; // This can be changed to your liking

self.navigationItem.rightBarButtonItem = rightButton;
[rightButton release];