How do i add my own slider images and own background image gamezone theme

I've been trying to add my own slider images but haven't been able to do so and my own background images on the gamezone theme,How woul'd I go about doing this and preferrably decrease the padding of the posting area also?

How do i replace the slider images and also change the background image?

Hi!
To replace slides you have to delete them on page Gamezone --> Slides in the dashboard. To change the background of slider you have to edit the code:

/*------------------------------ HEADER ------------------------------*/
#header .container{
	position:relative;
	background: rgb(234,234,234); /* Old browsers */
	background: -moz-linear-gradient(top,  rgba(234,234,234,1) 0%, rgba(255,255,255,1) 47%, rgba(234,234,234,1) 100%); /* FF3.6+ */
	background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(234,234,234,1)), color-stop(47%,rgba(255,255,255,1)), color-stop(100%,rgba(234,234,234,1))); /* Chrome,Safari4+ */
	background: -webkit-linear-gradient(top,  rgba(234,234,234,1) 0%,rgba(255,255,255,1) 47%,rgba(234,234,234,1) 100%); /* Chrome10+,Safari5.1+ */
	background: -o-linear-gradient(top,  rgba(234,234,234,1) 0%,rgba(255,255,255,1) 47%,rgba(234,234,234,1) 100%); /* Opera 11.10+ */
	background: -ms-linear-gradient(top,  rgba(234,234,234,1) 0%,rgba(255,255,255,1) 47%,rgba(234,234,234,1) 100%); /* IE10+ */
	background: linear-gradient(to bottom,  rgba(234,234,234,1) 0%,rgba(255,255,255,1) 47%,rgba(234,234,234,1) 100%); /* W3C */
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#eaeaea', endColorstr='#eaeaea',GradientType=0 ); /* IE6-9 */
}

in the file stile.css.

No to change the whole background image onthe theme to my own, not the slider image and how do i delete the sliders images and add my own and how woul'd i make the slider show the whole image size and what's the maximum amount of slides required?

You can simply adjust the size of your slider by editing the following code:

.fp-slides,.fp-thumbnail,.fp-slides-items  {
		height:480px;
		width:980px;
	}

in the file style.css.
This is a standart size for slider. I can also recommend you to edit your images using an image editor before adding them to your slider.