I am currently working on my blog http://www.xdesi.co and I installed the Special Recent Posts plugin. I got the thumbnail to show. But it is showing in the wrong place. If you notice, horizontal bar under theme that shows the title of the post, and next to it, the picture. How do I fix this so that title can be under thumbnail?

you should ask the author of that plugin

i am trying to interest css into style.css but somehow it's not working

div#hot div.srp-thumbnail-box, div#hot div.srp-content-box{display:block !important;padding-right:0px !important;padding-left:10px}
div#hot h4.srp-post-title{font-size:14px;text-align:center;font-weight:bold}a{color:#383838;font-weight:bold}

With Atahualpa, you add CSS to the 'CSS Insert' option