insurance fees on usps shipping

Our usps calculator isn't coming back with insurance added like the ups does - is there a way for the usps to add in the insurance cost to the shipping?  thanks.

No, that is another edit I had to make for UPS insurance to total the value of the order - and it works great... I'm talking about USPS shipping rates - it only returns the rates without insurance added... I need the USPS to return rates with insurance added in like UPS does.

For USPS, the link above only applies to international shipments:

'U.S.P.S. OPTIONAL VARIABLES
'******************************************************************
'// USPS Value of Content for International Rates Only
'// If specified, it is used to compute Insurance fee
'// (if insurance is available for service and destination) and
'// indemnity coverage.
'// To turn this variable on, change the value to "1"
'//
'// For Example:
'// pcv_UseValueOfContents=1

'******************************************************************
pcv_UseValueOfContents=1
'******************************************************************

We need to add insurance to domestic USPS also.  If the Post Office can't supply it, can you create an option in the Shipping Settings, allowing us to add insurance?  There is a spot to add a flat handling charge, but insurance varies depending on the price of the order.
The rates we need to add are the "USPS 1st Class/Priority" column here:
http://www.rings-things.com/misc/shipping_insurance.htm

(The insurance values returned by UPS & FedEx work fine -- it is only USPS that doesn't return any, so we'd like to go ahead and add them on our own.)

The USPS pdf link posted above goes to  a DRAFT version of the API for rate calculations. In conversations with regional USPS personal we are told that it is wrong and out of date.
(You've never had that experience with the PO before, have you?)

We were told that the USPS site should return domestic insurance rates. The other user interfaces do include domestic insurance. I'll keep this forum informed  if and when we learn more.

Version 2.3a is now available for 2010 (Document Version 2.3a (01/04/10)) but still only references insurance in the international section.