Product Page

I want to just change the ID: # field on the product page to show the SKU: # field could I just alter the <ul class=”list-group”> in the edit template or is it not that easy?

<li class=”list-group-item item1″>
ID: <span>#[ID]</span>

could I just change the above to SKU ? or would that not work.

I’ve looked at the Page Setup – Content Pages – Listing Page Layout
and then changed it to use custom layout but I just don’t get it as it removes the Add +/- quantity buttons and I don’t know how to add the fields