AddThis

w3c compliance

I am very fond of w3c compliance of code. I have found a way to improve the compliancy of the addthis code. (reduces 4 errors and 4 warnings)

instead of using the standard code addthis provides i use:
<!-- AddThis Button BEGIN -->
<div class="addthis_toolbox addthis_default_style ">
<a class="addthis_button_facebook_like" fb:like:layout="button_count">&nbsp;</a><a class="addthis_button_tweet">&nbsp;</a><a class="addthis_button_google_plusone" g:plusone:size="medium">&nbsp;</a><a class="addthis_counter addthis_pill_style">&nbsp;</a>
</div>
<script type="text/javascript" src="http://s7.addthis.com/js/250/addthis_widget.js#pubid=stramark"></script>
<!-- AddThis Button END -->

The question is: how can i have the standard wordpress plugin have the code implemented in my website. so: how do i use:
addthis_config values:
(json format)
addthis_share values:
(json format)
in the plugin?
(i have searched in google but could not find a single proper explanation

Email adres is: wblom and my domain is stramark.nl

I have tested this on http://www.stramark.nl/zoekmachine-marketing-bureau/faq/partners/ which results in no w3c compliancy errors :-)) I LIKE