Hi Nelson,
You could do this by having a regular button on the start page with the following Javascript in the click event:
xfa.host.setFocus(xfa.form.form1.p6.TextField1);
The TextField1 represents the first fields on page 6, which lets says is the page you want to link to.
You could set it up as a visible button for the user to click; or you could set the border and fill to none and place the button over some static text, telling the user to click here.
Good luck,
Niall