<div class="thumb">
<a href="<?php echo get_permalink(); ?>" title="<?php the_title(); ?>">
<div class="aktif">
<img src="http://üste gelecek resmin adresi" alt="" />
</div>
<img src="<?php echo get_post_meta($post->ID, "image", true); ?>" alt="<?php the_title(); ?>" />
</a>
</div>

.thumb{
position:relative;
overflow:hidden;
}

.aktif {
position:absolute;
margin:0;
border:none;
padding:0;
display:block;
}

.aktif img {
margin:50px 0 0 0;
border:none;
padding:0;
width:100px;
height:200px;
}