Is there anyway to make the rear windows roll all way down?

Whether or not your rear windows roll all the way down depends entirely on the vehicle's design. Some vehicles have rear windows that only open partially, often for safety and aerodynamic reasons, or to prevent drafts. Others have fully retractable rear windows.

There's no universal way to make a partially-opening rear window go all the way down. Modifying the window mechanism would require significant mechanical and potentially electrical work, and it's likely to be unsafe and void any warranty. It could also affect the structural integrity of the vehicle and its aerodynamic properties.

If you want fully retractable rear windows, your best bet is to buy a vehicle that has them.