Dear LiamBFC

I think you search it too far (an expression of the Flemish people...).
Normally you have something like this in your .ascx file:
<td class="ImgPrnt"><dnn:ACTIONBUTTON3 runat="server" id="dnnACTIONBUTTON3" CommandName="PrintModule.Action" IconFile="Print.gif" DisplayIcon="True" DisplayLink="False" /></td>

And the Print.gif file in the write folder. For instance:
DNN-ROOT\Portals\PORTALNAME\Containers\CONTAINERNAME\Print.gif

If you have placed your .gif files in another folder then the folder were you're .ascx control is set... then perhaps you must refer to another path. For instance: IconFile="Images/Print.gif".
Or perhaps you must indeed use <%= SkinPath %>.
Hope this will help.