In case someone need to bypass the confirmation step: Modify the /web/form/app/cls_ps_******.inc.php file like this:

//------------------------------------------------------
// Reg Page2
//------------------------------------------------------
case "reg_page2":

//-- [BEGIN] Validate prev PageID & Set new PageID
if ( !$sc->CheckPrevPageID(
array(
"reg_page1"
)
) ) break;
$sc->SetPageID( "reg_page2" );
//-- [END] Validate prev PageID & Set new PageID

//-- [BEGIN] Go
$sc->SetNextSc( "reg_page3" );
//-- [END] Go

break;

-------------------------------------------------------
-------------------------------------------------------

Thanks tom for pointing me on the right direction!

Thank you for your contribution!