Can I make USPS delivery confirmation required for first class mail?

This is what I want:

In the US, delivery confirmation required for first class mail, but not for priority mail (since it comes free).
Outside the US, this is not needed.
Delivery confirmation costs 90 cents.

How can I do this?
Thanks,

Aron

There is this
http://www.zen-cart.com/downloads.php?do=file&id=1267

But one would need to update it to
http://www.zen-cart.com/showthread.php?205250-USPS-RateV3-January-27-2013

My bad -it has been updated

stompbox:

This is what I want:

In the US, delivery confirmation required for first class mail, but not for priority mail (since it comes free).
Outside the US, this is not needed.
Delivery confirmation costs 90 cents.

I'm not sure that I understand the question. All my firstclass postage printed online can include delivery confirmation @ no additional charge. Signature confirmation incurs a charge.

Do you mean First class packages, first class thick envelopes or just a plain old #10 envelope weighing a couple ounces?