ok, so this is my first custom sidebox, so not sure I did it right, but...
I followed the instructions from:
http://www.zen-cart.com/wiki/index.php/Tutorial
my tpl_cover_sidebox.php looks like this:
PHP Code:
<div class="snavIssue">
<img style="border-width:0px;" src="images/PHG/snavIssueTop.gif" alt="On Stands Now" id="ctl00_ctl00_templateBody_imgSNavTop"><div class="snavIssueCopy">
<a target="_blank" title="Subscribe Today!" href="http://w1.buysub.com/online/PHG/website"><img border="0" style="border-width:0px;" src="images/PHG/btnVertSubscribe.gif" alt="Subscribe Today!" class="btnSubscribe" id="ctl00_ctl00_templateBody_ucSubscribe_imgBtnVertSubscribe"></a>
<img style="border-width:0px;" src="images/PHG/PHG0611_Cover0_ch.jpg" class="cover" id="ctl00_ctl00_templateBody_ucSubscribe_Image1">
<br style="clear: both;">
<div style="margin-top: 12px;" class="snavIssueDivider"></div>
<div onmouseout="sNavOff(this)" onmouseover="sNavOn(this, 'snavIssueOn' )" class="snavIssueOff"><span class="snavLink"><a target="_blank" href="http://w1.buysub.com/online/PHG/website">Subscribe Today!</a></span></div>
<div class="snavIssueDivider"></div>
<div onmouseout="sNavOff(this)" onmouseover="sNavOn(this, 'snavIssueOn' )" class="snavIssueOff"><span class="snavLink"><a href="http://phgmag.com/global/toc/">What' s Inside</a></span></div>
<div class="snavIssueDivider"></div>
<div onmouseout="sNavOff(this)" onmouseover="sNavOn(this, 'snavIssueOn' )" class="snavIssueOff"><span class="snavLink"><a href="http://phgmag.com/archive/">Article Archives</a></span></div>
<div class="snavIssueDivider"></div>
<div onmouseout="sNavOff(this)" onmouseover="sNavOn(this, 'snavIssueOn' )" class="snavIssueOff"><span class="snavLink"><a href="http://phgmag.com/global/contact/">Letters to the Editor</a></span></div>
</div>
</div>
All newly created files are a part a the custom template PHG_Template.
I knew I made a mistake somewhere, but it looks fine if I can just solve this heading issue.