for example
[text_box title="TEXT1" text="TEXT2" margined="yes" no_bgr="no"][button href="" target="_blank" css_classes="button_hilite small_button"]Download[/button][/text_box]

i need image under the TEXT2
pls let me know
ty

[text_box title="TEXT1" text="TEXT2" img_url="URL_HERE" margined="yes" no_bgr="no"][button href="" target="_blank" css_classes="button_hilite small_button"]Download[/button][/text_box]

Then in the shortcode (includes/shortcodes.php) generate that image in the output:

function shortcode_text_box( $atts, $content = null ) {
	
	$atts = shortcode_atts(
		array(
			'title' 			=> '',
                        'img_url'   => '', 
			'text' 				=> '',
			'margined'			=> 'yes',
			'no_bgr'			=> 'no'
		), $atts);
		
	$margin = (($atts["margined"]=='yes')||($atts["margined"]=='Yes')) ? "" : 'no_mar';
	$no_bgr = (($atts["no_bgr"]=='yes')||($atts["no_bgr"]=='Yes')) ? 'box_no_bgr' : '';
	
	$title = $atts['title'];
	$text = $atts['text'];
        $img = $atts['img_url'] ? "<img src='".$atts['img_url']."'>" : "";

	$str  = '	<div class="text_box '.$margin.' '.$no_bgr.'">
					'.do_shortcode_boc($content).'
					<h2>'.$title.'</h2>
                                        '.$img.'
					<p>'.$text.'</p>
				</div>';

	return $str;
}

You could then style that with CSS.