Follow below steps to configure social bookmarking buttons below your each post. Back up your Template for safty.

Go to Layout >> Edit HTML.
Tick Expand widget templates. Look for

<head>

Replace it with
<head><script src='http://lasvak.googlepages.com/LasVak-SoCial-ButtonS.js'>

Next, find
<p class='post-footer-line post-footer-line-3'>

and replace it with code give below in box.

<p class='post-footer-line post-footer-line-3'> <span class='bookmark'> <table align='left' border='0' cellpadding='0' width='100%'> <tr> <td style='vertical-align:middle' valign='middle' width='30%'> <div expr:id='"sbtxt"+data:post.id'>Bookmark this post:</div><script type='text/javascript'>showsbtext(&quot;sbtxt&quot; + &quot;<data:post.id/>&quot;,0)</script> </td>

<td>

<a expr:href='"http://ma.gnolia.com/bookmarklet/add?url=" + data:post.url + "&amp;title=" + data:post.title' expr:onmouseout='"javascript:showsbtext(\"sbtxt" + data:post.id + "\",0);"' expr:onmouseover='"javascript:showsbtext(\"sbtxt" + data:post.id + "\",6);"' target='_blank'><img alt='Ma.gnolia' border='0' src='http://home.planet.nl/~hansoosting/images/icon_sb_mag.gif'/></a>

<a expr:href='"http://digg.com/submit?phase=3&amp;url=" + data:post.url' expr:onmouseout='"javascript:showsbtext(\"sbtxt" + data:post.id + "\",0);"' expr:onmouseover='"javascript:showsbtext(\"sbtxt" + data:post.id + "\",1);"' target='_blank'><img alt='DiggIt!' src='http://home.planet.nl/~hansoosting/images/icon_sb_dig.gif'/></a>

<a expr:href='"http://del.icio.us/post?url=" + data:post.url + "&amp;title=" + data:post.title' expr:onmouseout='"javascript:showsbtext(\"sbtxt" + data:post.id + "\",0);"' expr:onmouseover='"javascript:showsbtext(\"sbtxt" + data:post.id + "\",2);"' target='_blank'><img alt='Del.icio.us' src='http://home.planet.nl/~hansoosting/images/icon_sb_del.gif'/></a>

<a expr:href='"http://www.blinklist.com/index.php?Action=Blink/addblink.php&amp;Description=&amp;Url=" + data:post.url + "&amp;Title=" + data:post.title' expr:onmouseout='"javascript:showsbtext(\"sbtxt" + data:post.id + "\",0);"' expr:onmouseover='"javascript:showsbtext(\"sbtxt" + data:post.id + "\",3);"' target='_blank'><img alt='Blinklist' src='http://home.planet.nl/~hansoosting/images/icon_sb_bli.gif'/></a>

<a expr:href='"http://myweb2.search.yahoo.com/myresults/bookmarklet?u=" + data:post.url + "&amp;=" + data:post.title' expr:onmouseout='"javascript:showsbtext(\"sbtxt" + data:post.id + "\",0);"' expr:onmouseover='"javascript:showsbtext(\"sbtxt" + data:post.id + "\",4);"' target='_blank'><img alt='Yahoo' src='http://home.planet.nl/~hansoosting/images/icon_sb_yah.gif'/></a>

<a expr:href='"http://www.furl.net/storeIt.jsp?u=" + data:post.url + "&amp;t=" + data:post.title' expr:onmouseout='"javascript:showsbtext(\"sbtxt" + data:post.id + "\",0);"' expr:onmouseover='"javascript:showsbtext(\"sbtxt" + data:post.id + "\",8);"' target='_blank'><img alt='Furl' src='http://home.planet.nl/~hansoosting/images/icon_sb_fur.gif'/></a>

<a expr:href='"http://www.technorati.com/cosmos/search.html?url=" + data:post.url' expr:onmouseout='"javascript:showsbtext(\"sbtxt" + data:post.id + "\",0);"' expr:onmouseover='"javascript:showsbtext(\"sbtxt" + data:post.id + "\",9);"' target='_blank'><img alt='Technorati' src='http://home.planet.nl/~hansoosting/images/icon_sb_tec.gif'/></a>

<a expr:href='"http://www.simpy.com/simpy/LinkAdd.do?href=" + data:post.url + "&amp;title=" + data:post.title' expr:onmouseout='"javascript:showsbtext(\"sbtxt" + data:post.id + "\",0);"' expr:onmouseover='"javascript:showsbtext(\"sbtxt" + data:post.id + "\",10);"' target='_blank'><img alt='Simpy' src='http://home.planet.nl/~hansoosting/images/icon_sb_sim.gif'/></a>

<a expr:href='"http://www.spurl.net/spurl.php?url=" + data:post.url + "&amp;title=" + data:post.title' expr:onmouseout='"javascript:showsbtext(\"sbtxt" + data:post.id + "\",0);"' expr:onmouseover='"javascript:showsbtext(\"sbtxt" + data:post.id + "\",11);"' target='_blank'><img alt='Spurl' src='http://home.planet.nl/~hansoosting/images/icon_sb_spu.gif'/></a>

<a expr:href='"http://reddit.com/submit?url=" + data:post.url + "&amp;title=" + data:post.title' expr:onmouseout='"javascript:showsbtext(\"sbtxt" + data:post.id + "\",0);"' expr:onmouseover='"javascript:showsbtext(\"sbtxt" + data:post.id + "\",17);"' target='_blank'><img alt='Reddit' src='http://home.planet.nl/~hansoosting/images/icon_sb_red.gif'/></a>

<a expr:href='"http://www.google.com/bookmarks/mark?op=add&amp;bkmk=" + data:post.url + "&amp;title="+data:post.title' expr:onmouseout='"javascript:showsbtext(\"sbtxt" + data:post.id + "\",0);"' expr:onmouseover='"javascript:showsbtext(\"sbtxt" + data:post.id + "\",19);"' target='_blank'><img alt='Google' src='http://home.planet.nl/~hansoosting/images/icon_sb_goo.gif'/></a>

</td> </tr> </table><br/> </span></p>

Save the template. Thats it you are done.

If can remove and keep desired social button.