customizing browse bar in wp photo album plus

hello,

i am using the really great plugin “wp photo album plus” and i’m very happy that i found a gallery plugin, which is this customizable.
but i miss the possibility to change the browsing bar of the slideshow: i would like to display simple arrows (like in the filbstrip-bar); how can i change the code? – and especially: where do i find it?

thanks a lot!
sarah