below is the breakdown of the product info page, note the product description is inside the form. The tabbed addon sticks its stuff inside the products description, and is controlled by tags within the products description to determine what the tabs are.
Code:
<!--bof Form start-->
<!--bof Category Icon -->
<!--eof Category Icon -->
<!--bof Prev/Next top position -->
<!--eof Prev/Next top position-->
<!--bof Main Product Image -->
<!--eof Main Product Image-->
<!--bof Product Name-->
<!--eof Product Name-->
<!--bof Product Price block -->
<!--eof Product Price block -->
<!--bof free ship icon -->
<!--eof free ship icon -->
<!--bof Product description -->
<!--eof Product description -->
<!--bof Add to Cart Box -->
<!--eof Add to Cart Box-->
<!--bof Product details list -->
<!--eof Product details list -->
<!--bof Attributes Module -->
<!--eof Attributes Module -->
<!--bof Quantity Discounts table -->
<!--eof Quantity Discounts table -->
<!--bof Additional Product Images -->
<!--eof Additional Product Images -->
<!--bof Prev/Next bottom position -->
<!--eof Prev/Next bottom position -->
<!--bof Reviews button and count-->
<!--eof Reviews button and count -->
<!--bof Product date added/available-->
<!--eof Product date added/available -->
<!--bof Product URL -->
<!--eof Product URL -->
<!--bof also purchased products module-->
<!--eof also purchased products module-->
<!--bof Form close-->
<!--bof Form close-->