Smooth Scroll

So I wanted to have a bit more flexibility on my Smooth Scroll especially when I modify my main header’s height, I here for used the following code:

jQuery(document).ready(function($){
	//Smooth Scroll
	$(function(){
		setTimeout(function(){
			if(location.hash){
				window.scrollTo(0,450);
				target = location.hash.split('#');
				smoothScrollTo($('#'+target[1]));
			}
		},1);
		$('a[href*="#"]').not('[href="#"]').not('[href="#0"]').click(function(){
			if(location.pathname.replace(/^\//,'') == this.pathname.replace(/^\//,'') && location.hostname == this.hostname){
				smoothScrollTo($(this.hash));
				return false;
			}
		});
		function smoothScrollTo(target){
			var nav = $("#SHSHeader").height()+20;
			if(target.length != 0){
				target = target.length ? target : $('[name=' + this.hash.slice(1) +']');
				if(target.length){
					$('html,body').animate({scrollTop:target.offset().top-nav},1200);
				}
			}
		}
	});
	$(window).bind("mousewheel",function(){$("html,body").stop(true,false);});
	//End
});

Yes this seems to be conflicting with the already included Smooth Scroll by GeneratePress, I was wondering where I can find the original Smooth Scroll to either deque it and replace it by mine OR modify it to fit my needs OR request a feature that you can adjust the offset of the smooth scroll by X amount of pixels AND have an option to have scroll from top to anchor point if you come from a new page.

Thanks in advance for further information.